Don't worry, I'll make a few experiments and see what happens. I just need to now one thing: Handling of MSI4.5 should somehow be excluded from "regular" HF handling and be dealt with separately, right? (I think that's what happens in HFSLIP) Oh, and BTW, looking at HFSLIP's code, it seems it extracts all mui files, then finds the one corresponding to the language in SOURCE and renames the file to msimsg.mui. Something like that needs to be done. Ok, I now know what's going on: First 942288 has to be added to the "ignore" variables. Then, a special section for MSI45 needs to be created. The file msimsg.dll.xx-yy.mui needs to be renamed to msimsg.mui (where xx-yy is the lang in source) Add the correct values to txtsetup.sif/dosnet.inf Finally the files need to be copied to the appropriate folders. The code could be ported, the problem is that the dir. structure used by HFSLIP64 is different from the one used by HFLSIP, plus the variable names are also different. If that can be figured out, it wouldn't be very difficult, I guess.