Thanks for the upload. I gave it a go on Win 98Se with KernelEx and the result is build failure. The project scripts try to shell execute "cmd.exe". There is no such thing as cmd.exe on Windows 98, there is command.exe instead! Also, it tries to use a program called vdk.exe to build a floppy image. VDK.exe says it runs on WinNT only, not on Win98. The virtual drive cannot be created on Win98, meaning when the script tries to copy files into the virtual floppy image, the result is build failure. The offending lines: ShellExecute,Hide,"cmd.exe","/c #$q#$q%Tools%\VDK\VDK.EXE#$q OPEN * #$q%Temp%\WIN98\WIN98.IMG#$q /L:%pScrollBox61% /RW#$q#$q"//ShellExecute,Hide,"imdisk.exe"," -a -f #$q%Temp%\WIN98\WIN98.IMG#$q -m %pScrollBox61%:#$q"FileCopy,"%Work%\*.*","%pScrollBox61%:\"FileCopy,"%Work%\DOS\*.*","%pScrollBox61%:\DOS\"FileCopy,"%Work%\WIN98\*.*","%pScrollBox61%:\WIN98\"FileCopy,"%Tools%\MENU.LST","%Temp%\"FileCopy,"%Tools%\GRLDR","%Temp%\"ShellExecute,Hide,"cmd.exe","/c #$q#$q%Tools%\VDK\VDK.EXE#$q CLOSE * /F#$q#$q"//ShellExecute,Hide,"imdisk.exe"," -D -m %pScrollBox61%:#$q"It needs a Win 98 compatible way to build the floppy image.