Sandy, I also have a '755CX - I installed WFWG 3.11 on top of the pre-loaded WIN 3.11 without a hitch. I then installed Proxim's RangeLan/2 PCMCIA spread spectrum wireless network, again without a hitch. The only thing I did prior to this was to un-install Warp. I'm now sending this message via RF to a shared modem on another machine - all seems to be working fine. This is a 755CX/16MB/810HD. Jim Lee