Yes, itīs crititcal... but I donīt know if it happens to everybody...
Iīve posted this mini-guide in other forum and nobody had this error... only me
The solution is extract this archive from original cab and adding it in the new created (maybe a problem with crc).
Look at i6comp commands... i donīt remember wich one is used to extract files...
Donīt be afraid and try it... always with safety copy