Wow,
I think I've got it working.

I've got XGWorks working on my old xp netbook .

All I did was copy the Yamaha folder that the program is in onto a zip drive, then copied it into my Win7 laptop.

In short, I didn't actually try & install the program, because every time I put the program disk in my win 7 computer it rejected it as not suitable.

I copied the little icon that starts the program onto my desktop, clicked on it, and amazingly the program opened.

I loaded a couple of midifiles, so far so good.

Sounds too good to be true, so I've got my fingers crossed.

Got a couple of other old programs I couldn't install, might try the same thing.