Dosbox is a bit of a cpu hog if i remember correctly (I use pure dos if i need it).
Not only that, To get it to work on the GP, It would have to run on top of a x86 emulator etc etc. I know port was mentioned (i`m not a coder).
It would probably be easier to port the Amiga emulator for Zodiac over to the GP and play the Original and Best version of sensible soccer.
Saying that, Reesy is currently working on some of the bugs in cyclone, DrMD (megadrive emulator), And sensible soccer was mentioned, So there could be a possibility of it working soon.
Trooper