Hmm… I don’t have DF2 here for testing. I tried 320×200 and 512×384 in thief and Half-Life, ingame if available, and via cfg-file editigin, but this either didn’t work or even crashed the game.
As I said, this didn’t work in the official/svn PC version of Dosbox, either. But I’ll give it another try. Thief on my phone would be uber-awesome. ?