There is a driver for accessing ffs from WindowsXP, but I have never used it, so it would be at your own risk:
http://ffsdrv.sourceforge.net
I noticed a "3.x" in your message, which hopefully is a typo :-) ... because the ffsdrv driver would do no good for you on Windose 3.x.
If you try the ffsdrv project code, let me know if it works, and maybe I'll give it a go ....
- rleesBSD