it looks like 18.104.22.1682 was the last version that supported ich6r and it isn't listed as being compatible with windows 7. the download page for this version specifically states it's the last version for ich6r. I was able to install it by right clicking the executable, selecting properties, compatibility tab and installing in compatibility mode for vista sp2. perhaps this is risky. I also wanted to be able to monitor the status of a rebuild. I have a dell dimension 8400 with win7sp1 32 bit. it doesn't see much use but still works.
intel currently suggests that 22.214.171.1243 is ich6r compatible on the download page, but the readme doesn't list it. the above note on 126.96.36.1992 also suggests it won't work.
I just realized how old your post is. you probably don't even use the system in question anymore.