(designed for WM r593, may or may not work fine with future versions)
I've updated the UI mod to include a widescreen version. It's pretty much the same as the pics below, except the buttons are smaller and the Girl Management screen is slightly different.
What it does:
1. Higher font size on the smaller text, except in the ordered lists because that seems to be stored in the .exe (correct me if I'm wrong).
2. Girl Management screen modified heavily. It's designed to maximize the picture of the girl, because the profile pics are often some of the hottest pics of any given girl in the game. It now looks like this:

3. Girl Details also modified to maximize the viewing area for jobs and traits, so you don't have to scroll down as much:

Now, I don't know if this has been done before so I don't know if I'm stepping on any toes. I just wanted to modify the UI to look nicer at higher resolutions.
INSTRUCTIONS:
For 4:3 (old monitors)0. Download
this.
1. Go into your Whore Master folder and find ScreenMode.txt . Open that up and change the resolution in there to "1280 1024". I recommend making it full screen by changing the 3rd line to "true".
2. Extract the files you downloaded.
3. Go into /(whoremaster folder)/Resources/Interface and make a new folder. Copy and paste all of the files here into the new folder. This will be your backup in case you don't like the new interface.
4. Copy and past the stuff you extracted into /(whoremaster folder)/Resources/Interface . If you don't get a prompt to overwrite, you did it wrong.
5. Try it out. If you don't like it, open up ScreenMode.txt and put it back to the way it was. Go into your backup folder you made in step 3 and copy everything back into your /Interface folder.
For 16:9 (widescreen)0. Download
this.
1. Go into your Whore Master folder and find ScreenMode.txt . Open that up and change the resolution in there to "1600 900". You can make it full screen by changing the 3rd line to "true".
2. Extract the files you downloaded.
3. Go into /(whoremaster folder)/Resources/Interface and make a new folder. Copy and paste all of the files here into the new folder. This will be your backup in case you don't like the new interface.
4. Copy and past the stuff you extracted into /(whoremaster folder)/Resources/Interface . If you don't get a prompt to overwrite, you did it wrong.
5. Try it out. If you don't like it, open up ScreenMode.txt and put it back to the way it was. Go into your backup folder you made in step 3 and copy everything back into your /Interface folder.
This UI is designed specifically for the resolutions mentioned in the instructions. If you go above or below those resolutions, things will fall out of alignment and will look messed up.
Edit: added widescreen version.