Sublynx,
Are you refering to,
running the batch file?
Adjusting the window manager?
or hex editing the .dll?
Just a few things I can think of:
https://wiki.winehq.org/FAQ
Sometimes a bit out of date, but most of it is accurate and up to date.
They release a new wine every 2 weeks, so I doubt the documentation is always on point.
Although I believe A.G Mentioned you can use the widescreen mod by running full screen, WITHOUT the program/patch.
It might need a window component installed in a new or existing 'prefix'.
If it's called through a .bat file, a quick google search found this:
http://www.linux.org/threads/running...on-linux.7610/
Gives a rundown on what to do, and how to do it.
Apologies if I covered anything you already knew, (what little I covered) but figured I would start with the basics and go from there.
It's currently the wee hours of the morning, so this is probably a bunch of jibberish...
But if you want me to clarify any part of this, let me know and I will try to go into more detail.
Barracuda
p.s. Oops, just noticed his comment about setting the .dll to native, you can do that though wine configuration, should be in your launcher (i.e. "start menu") under the "Wine" menu.
then select the "Libraries" tab, select the .dll from the drop down list "new override for library:" then add, then select the .dll in the list, and choose edit.
Then select which option you want...