My apologies for the confusion. When I originally referred to 'batches', I was talking about the gooey in SPM whereby one can create a batch to carry out multiple things at once (e.g. Realignment, Normalisation, Smoothing, etc.). My question was with regards to the script files that can be created by clicking "Save As... Batch and Script" (which creates a .job file and a .m file).
I was looking for an easier way to run multiple scripts, aside from copying and pasting them into one long script and running that.
Thank you for your help, M