Some Packages overlooked by instaDMG

I'm slowly migrating my imaging system to use InstaDMG, curently using 1.4b1 with some success, however I'm encountering certain packages, typically the ones I really would like to use which instaDMG just skips. Two good examples are the CreateUser and ClearReg packages available from AFP548's download section: Taken from the InstaDMG log... [code] installer: Error the package path specified was invalid: './CustomPKG/12/._createUser.pkg createUser.pkg'. installer: Error the package path specified was invalid: './CustomPKG/13/._clearReg.pkg clearReg.pkg'. [/code] Both are packages with empty payloads running scripsts but I don't see why that would mean they have an invalid path?!? Suggestions and explanations most welcome. Thanks, Stephen