Can I use VS2008 Express with loadlibrary?

I've read a fair number of posts on compiler compatibility, etc., but I'm still not clear on this. My OS is Win7-Pro/SP1-x64, I'm using R2010a and have installed VS2008 Express SP1 as well as SDK7 + .NET 3.5. I can do mex -setup and see the expected option (see below). I can also compile and run yprime without issue, so it seems the 64b compiler is set up correctly. However when I try to use loadlibrary() I get an error that cl can not be found. A bit more investigation shows that loadlibrary is calling vcvarsall.bat which for some reason can not find the amd64 compiler options.

Am I attempting the impossible here? I didn't notice until after going through this that the compiler-selection matrix for r2010a does not have a check mark for VS2008-Express under "for shared library interface," which I'm now guessing is loadlibrary, even though the non-express version is checked.

TIA, Fred

Output transcript:

mex -setup

Please choose your compiler for building external interface (MEX) files: 

Would you like mex to locate installed compilers [y]/n? y

Select a compiler: 
[1] Microsoft Visual C++ 2008 Express in C:\Program Files (x86)\Microsoft Visual Studio 9.0 

[0] None 

Compiler: 1

Please verify your choices: 

Compiler: Microsoft Visual C++ 2008 Express  
Location: C:\Program Files (x86)\Microsoft Visual Studio 9.0 

Are these correct [y]/n? 

*************************************************************************** 
  Warning: MEX-files generated using Microsoft Visual C++ 2008 require 
           that Microsoft Visual Studio 2008 run-time libraries be  
           available on the computer they are run on. 
           If you plan to redistribute your MEX-files to other MATLAB 
           users, be sure that they have the run-time libraries. 
*************************************************************************** 

Trying to update options file: C:\Users\<me>\AppData\Roaming\MathWorks\MATLAB\R2010a\mexopts.bat 
From template:              C:\PROGRA~1\MATLAB\R2010a\bin\win64\mexopts\msvc90freeopts.bat 

Done . . . 

************************************************************************** 
  Warning: The MATLAB C and Fortran API has changed to support MATLAB 
           variables with more than 2^32-1 elements.  In the near future 
           you will be required to update your code to utilize the new 
           API. You can find more information about this at: 
           http://www.mathworks.com/support/solutions/en/data/1-5C27B9/?solution=1-5C27B9 
           Building with the -largeArrayDims option enables the new API. 
************************************************************************** 

>> mex -v yprime.c
 This is mex, Copyright 1984-2007 The MathWorks, Inc. 

-> Default options filename found in C:\Users\<me>\AppData\Roaming\MathWorks\MATLAB\R2010a 
---------------------------------------------------------------- 
->    Options file           = C:\Users\<me>\AppData\Roaming\MathWorks\MATLAB\R2010a\mexopts.bat 
      MATLAB                 = C:\PROGRA~1\MATLAB\R2010A 
->    COMPILER               = cl 
->    Compiler flags: 
         COMPFLAGS           = /c /Zp8 /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD 
         OPTIMFLAGS          = /O2 /Oy- /DNDEBUG 
         DEBUGFLAGS          = /Z7 
         arguments           =  
         Name switch         = /Fo 
->    Pre-linking commands   =  
->    LINKER                 = link 
->    Link directives: 
         LINKFLAGS           = /dll /export:mexFunction /LIBPATH:"C:\PROGRA~1\MATLAB\R2010A\extern\lib\win64\microsoft" libmx.lib libmex.lib libmat.lib /MACHINE:X64 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /incremental:NO /implib:"C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\templib.x" /MAP:"yprime.mexw64.map" 
         LINKDEBUGFLAGS      = /DEBUG /PDB:"yprime.mexw64.pdb" 
         LINKFLAGSPOST       =  
         Name directive      = /out:"yprime.mexw64" 
         File link directive =  
         Lib. link directive =  
         Rsp file indicator  = @ 
->    Resource Compiler      = rc /fo "mexversion.res" 
->    Resource Linker        =  
---------------------------------------------------------------- 

--> cl  /c /Zp8 /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD /FoC:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\yprime.obj -IC:\PROGRA~1\MATLAB\R2010A\extern\include -IC:\PROGRA~1\MATLAB\R2010A\simulink\include /O2 /Oy- /DNDEBUG -DMX_COMPAT_32 yprime.c 

yprime.c 
yprime.c(85) : warning C4267: '=' : conversion from 'size_t' to 'mwSize', possible loss of data 
yprime.c(86) : warning C4267: '=' : conversion from 'size_t' to 'mwSize', possible loss of data 
    Contents of C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\mex_tmp.rsp: 
  C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\yprime.obj 

--> link /out:"yprime.mexw64" /dll /export:mexFunction /LIBPATH:"C:\PROGRA~1\MATLAB\R2010A\extern\lib\win64\microsoft" libmx.lib libmex.lib libmat.lib /MACHINE:X64 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /incremental:NO /implib:"C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\templib.x" /MAP:"yprime.mexw64.map"  @C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\MEX_TMP.RSP   

     Creating library C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\templib.x and object C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\templib.exp 

--> del "C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\templib.x" "C:\USERS\<me>\APPDATA\LOCAL\TEMP\MEX_O2~1\templib.exp" 

--> mt -outputresource:"yprime.mexw64;2" -manifest "yprime.mexw64.manifest" 

Microsoft (R) Manifest Tool version 5.2.3790.2076  
Copyright (c) Microsoft Corporation 2005.   
All rights reserved.  

--> del "yprime.mexw64.manifest" 

--> del "yprime.mexw64.map" 

>> yprime(1,1:4)

ans =

      2.0000    8.9685    4.0000   -1.0947

>> <my script w/loadlibary>

??? Error using ==> loadlibrary at 368
Failed to preprocess the input file.
 Output from preprocessor is:'cl' is not recognized as an internal or external command,
operable program or batch file.