NI under linux and tolower

[-Turambar90-]

I'm trying to use NI for my BG2 install under linux.
While it appears to work perfectly on a vanilla game, it does not work since I've run tolower to install weidu mods: it's still looking for upper-case biff files, and so it can't open any file; moreover, it doesn't see any file in the override folder, either.
The game does work and I can open files with DLTCEP, so it's not a problem with the chitin.key. Is there any linux version of NI, or any way to ignore case differences between the .key and the biffs?
TIA

[the bigg]

I had made diffs four years ago to lowercase calls on file names, but I'm not sure if they're applicable to the current source code: http://forums.pocketplane.net/index.php/topic,23303.0.html (and I'm sure somebody who knows Java's internals can think of better approaches).

[Celti]

I found a method that's easier (for me) than patching NI.
Use the http://www.brain-dump.org/projects/ciopfs/ - it's a case-insensitive overlay filesystem.
Hope this helps other Linux-users out there.