Any way to do this manually if the .bat file is failing to recogniuze the VPatch.exe as a command?
Not that I'm aware of sorry, but make sure you've extracted NormalityUsVoices_RunMe.BAT and NormalityUsVoices_VPatch.exe to the Normality install folder (i.e. the one with NORM.EXE and NORMAL.GOG in it) before running the bat file. I've just tested it again and it worked fine.
Hopefully that was your issue, if not then I'm afraid I can't think of what else it would be.