This is just a skin, but I created that apk for people like you that have high res screens that aren't supported yet.
Try reinstalling the apk. This time, remove everything from the sdcard (rename the folder), and put on the sdcard only the files included with the apk. If that still fails to fix the problem, try manually placing this sys.txt:http://www.multiupload.com/5KB66T2MNH
In the folder
and then running the program again. Once you can get the app to load, copy over your content folder to the sdcard to get your maps and what not.
I have not tested this outside of an emulator, but others have reported that it works. It works best with Android 3.2 and up.
If that still fails to work, install the Thin iGO and download the 800x480 skin. Next place this line in your sys.txt:
It's not the best option, but it should work.