It was my understanding that Windows 95/98 didn't support the S-760 (or Roland didn't support Windows 95/98). Either way, I have heard that Windows won't recognize it.
This is a bummer, as I purchased Steinberg Recycle and a SCSI card specifically to hook up with my S-760, and come to find out that the 760 isn't supported. Luckily I took back the SCSI card and I use Recycle with Cubase, so all is not lost. I just wish I could hook up the 760 for quick sample dumps with the computer.
I think it is a shame that Roland has abandoned support of their samplers. I am sorry to say, but you are out of luck.