I played BoltyBoy's RTCW old west map and it was pretty good. At the time it was just a map and skins for the regular RTCW game. His bank looks pretty familiar too
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I'm a little non-plussed by what I'm seeing weapons wise. A "handheld gatling prototype" doesn't do much for me and I've thought it's been something that's ruined most previous western games (like wanted HL) and a Harpers Ferry musket is about 20-30 years out of date (why not use a Sharps, a Remington Rolling block or a Trapdoor Springfield???).
I'll probably download the conversion and give it a look though. The map and skins quality was quite good on his other release.