Thanks for the quick answers, although I seem to be missing something.
The 16Meg zip (64meg on un-zipping) I have seems to only contain the following file types:
3 Applications (CreatScript.dll, RunScript.dll, Script ObjectWizardAddIn.dll)
1xAPS file
1xCLW file
many CPP files
many DSP files
a few DSW files
many H files
an icon file
some LIB files
NCB files
OPT files
PLG files
5 readme's (that don't help)
some SCC files
TEMPLATE files
These extract to numerous directories
no .MCT or .SCR files in sight.
Have I downloaded the right thing? I fear not