If WIHU is present in \$OEM$\WIHU and the applications are present in \Install with the root folder being the CD, how do i specify the relative paths?

I've never tried because I use a folder called "Apps" in $OEM$ (windows only looks for subfolders like $$) but you can try with "\.." which means "parent folder".
For example, c:\windows\.. is c:\ and c:\windows\system32\.. is c:\windows.
And I think you would then use "..\..\Install\foo\bar".

Hey, nice idea. I'll try that and see.

It works, thx