CTmouse is pretty good, been around for a while now.
http://cutemouse.sourceforge.net/
v1.9.1 is the one you should try.
Otherwise there are more generic mouse drivers, as MS drivers
http://www.softwarepatch.com/utilities/msdosmouse.html
Generic drivers usually have a bigger footprint than CTmouse.
Another generic driver that works pretty swell and is easy to use:
http://www.powerspec.com/support/dri...smouse_15.html
Etcetera etcetera, most MsDos mouse drivers, whatever, will do , but usually takes more basic mem than CT mouse.