Ok, this is what u need to do...
1-Go to your shadowbane config directory. (Most likely in Ubi/Shadowbane/Config)
2-Find the file named Arcanepref.cfg
3-Copy this file and put it in a folder where you will remeber where it is.(Something different than the shadowbane folder)
4-Go back to the Shadowbane/Config/ folder and Open the ArcanePref.cfg with Notepad. (Right click, open with....)
5-Open the file I have attached with Word.
(Open with winzip, or some other un-zipping file.)
6-Highlight and Copy the whole thing (The new one opened in word)
7-Then Paste it over the Old ArcanePref.cfg file.
8-Save changes and exit.
9-Log onto shadowbane.(It might have to patch a file or two-highly doubtful though) And Delete the account that is on the login and use your own account.
10-From there, you can change anything you want-Resolution, chat fonts, anything. Your best bet is probably to run it at the setting i have put on there, which is 1024x768, anything after that, would make it a bit more laggy.