Dual Moniter System

last night i was digging around my attic, surprizingly i found my P1 system there, i ddnt even bother trying to boot it up since i know its jsut a waste of time, i opend the case a took anything i can, case fans, cpu fans, cd rom and hell, even the graphic card which is a S3 Trio64/DX (wow...the days of DOS games and never wonder anything about what goes on inside a computer, those were the days )
I decide im gonna stick this in my PIII system, which is rather old itself (but its holding on), and make it dual monitor, one play games and one just in windows chatting or surfing the web....however, i hav little knowledge on this matter (not that i have ANY other knowledge anyways )
can any one gimmie sum tips on what programm i shud use?? or any other possible problems that i might face (and soultions plz)

specs

PIII 1ghz
geforce 2 mx 32mb (with a 17" Samsung Sync MAster)
512 ram pc133 ram