i dunno, try
this?
if Fatigue999 says that he has the mouse in ps2 and com and it works then i guess you could try buyng usb to com port. or google for an
emulator. but maybe on dosbox forums they will tell you more about this, maybe it can be emulated in dosbox, i don't know about this
dunno, a while of googling gave me
this but i haven't even read it completely=P you can try
or you can try
emulating a mouse via keyboard, maybe it has com mouse in options, haven't tried neither
well, that's a lot of trying i guess, good luck=P