How can I install mods on the Mac release of Planescape Torment?

Question 1

So, GOG has gone to the trouble of releasing Planescape: Torment for OS X thanks to the wonders of WINE. Hooray!

Unfortunately, said release does not include the core mods that are widely regarded as essential for playing the game today.

I happen to agree that at a minimum the widescreen and UI patch, and WeiDU Fixpack mods are essential these days, and am super fond of Unfinished Business and the Tweaks tool as well. Unfortunately, the method for installing all of these requires an executable windows application. Which, of course, means that I can’t easily install them under OS X.

Is there any way to manually load/install these modifications, or are there mac versions of the core mods available somewhere?

Question 2

As user319078 says, the instructions at http://www.controlcommandescape.com/reviews/planescape-torment-review/ will work:

Download our mod compilation pack, which contains all the mods listed above as of 6 August 2012, and unzip it.

Right-click on the Planescape Torment application, and choose Show Package Contents.

Double-click on the drive_c shortcut, and from there go to Program Files/GOG Games/Planescape Torment/

Copy all the files and folders from the compilation pack (from within the pstmods folder) here.

Go back to the Planescape Torment application and double-click it whilst holding down the option key.

From the window that opens, click “Advanced”, then “Browse”.

From the file browser, go to Program Files/GOG Games/Planescape Torment and choose the Setup-PST-Fix.exe file, then click Done, then Quit.

Double-click the Planescape Torment application. A text window will pop up, follow the prompt to set your language and other options (it can take a while to patch some of the files).

Repeat steps 5-8 for the files Setup-PST-UB.exe, Setup-PST-Tweak.exe (you can probably skip this one if you’ve never played the game before), setup-widescreen.exe (you’ll need to enter your screen resolution for this mod), Setup-GhostDog’s-PST-UI.exe (setting text to 80% bigger works well for HD resolutions). If at any point the icon just bounces in the dock, force-quit it a couple of times and try again (or logout and back in and try again).

Double-click the Planescape Torment application whilst holding down the option key, click Advanced and go to Program Files/GOG Games/Planescape Torment and choose the torment.exe file, then click Done, then Quit.

You can now play the game normally.

It’s worth noting that there’s actually a Mac version of some of the mods, such as the widescreen mod, although it is not code-signed, and in any case I couldn’t get it to work.

But for every other mod, you can try the following approach:

Download the specific mod you want to use. For this example, I’ll use the Ghostdogs_PST_UI_mod_v2.01.7z (although at the time of writing, that site appears to be down)
Extract the files from the mod archive (The Unarchiver works)
Right-click on Planscape Torment (sic) and choose Show Package Contents
Double-click the drive_c alias and browse to GOG Games/Planescape Torment
Copy or move the extracted files into that folder, making a note of the name of the file with the exe extension (Setup-GhostDog's-PST-UI.exe)
Click the back button in Finder a couple of times, so that you’re back inside the Planscape Torment.app folder.
Double-click Wineskin.app
Click Advanced and then the Tools tab, and then Command Line Shell
In the window that appears, type cd "..\..\GOG Games\Planescape Torment"
Type the name of the mod exe file (Setup-GhostDog's-PST-UI.exe) and press return
Follow the prompts, if there are any (refer to other mod guides for specific options)
Repeat for any other mods
Close all the windows
Run the game as normal