I tried reading that back when it was still releasing chapters (Found it originally I think while reading Flambe by Bridget, whom was on the same site), did not care for The Battletech story myself, but that is probably due to my lack of interest in Battletech... and a general dislike of fusions, preferring a crossover to a fusion.
Ehhh... first few chapters are on FF.NET, probably should be taken down, if not original author?
In any case the whole thing (chapter 1-32, plus 3 epilogues) is available through Internet Archive... 3.29mb of Text files...
I remember there being a lot of fan art for this, but only saw 3 images. Could be Wayback Machine/Internet Archive never got it, or it was on a external site.
RANMA-MULTI 'BattleTech A Saotome Gambit' by J. Austin Wilde
- [Direct] https://web.archive.org/web/20050309235222/http://www.gci-net.com/users/w/wildeman/jamie.htm