I've been dying to play Planescape: Torment and it's finally come to Linux (albeit under the guise of Wine). This pre-setup version works better than me installing it via Wine myself, so following the existing Linux mod guide has led me to a problem.
It starts with me trying to install the Widescreen Mod. I've tried both the Windows version (as is done in the Linux mod guide) as the Linux version, and both give me the same errors:

"ERROR: BIFF [./AR0100.BIF] cannot be loaded: Unix.Unix_error(20, "stat", "./ar0100.bif")

ERROR locating resource for 'COPY'
Resource [AR0100.WED] not found in KEY file:
[./chitin.key]
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.

You need to perform a full install of your game and make sure that the .ini points to the correct paths.

Posts reporting this problem WILL BE IGNORED unless you can prove you're under exceptional circumstances.

Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.

ERROR Installing [for the original Infinity Engine (CHOOSE THIS!)], rolling back to previous state
Will uninstall 53 files for [widescreen/widescreen.tp2] component 0.
Uninstalled 53 files for [widescreen/widescreen.tp2] component 0.
ERROR: Failure("resource [AR0100.WED] not found for 'COPY'")
PLEASE post the contents of the file setup-widescreen.debug to this forum: [link removed]"

I have the game in ~/data/pst/prefix/drive_c/GOG Games/Planescape Torment/, and I've adjusted my linux.ini accordingly, even adding quotation marks and/or backslashes to no avail. Going on the succes I have with installing the Windows version in Wine, I don't suppose it's due to game being incomplete, which leaves the option that I'm wrongly editing my linux.ini.

If anyone can help me get this plan on the way, not only I but other clueless users will be helped out, and we will all be able to party like it's a 1999/2000-themed party in 2014 running on a Linux machine.

I still have exactly the same problem. I would be happy about any advice.

So the strange issue I have with this is rather easily solved. For some reason, the Widescreen mod also checks your cache folder, which needs to have a vanilla copy of your data folder. Don't forget to manually empty out that folder after you've installed the Widescreen mod or you may load mismatche files.

What cache folder???

EDIT - nvm, found it