Do not use TomsRtBt to install Gentoo via floppy. At least Gentoo 1.4 and above (2004.x included).
I am working on a how-to by using Slackware or Redhat floppies, but gees, it seems like such a kludge! Like, "To install gentoo via floppy, first install Red Hat 8." That seems so weak. I'd love to make my own Gentoo floppy set, call it "Punkie's Gentoo Boot Floppies." There's a Sourceforge project that's doing the same thing, but it hasn't been updated since February, and the last alpha build had a serious error where it hangs at some "unloading 122kb kernel memory" part.
This is silly. How can Gentoo not have floppy installation smoothed out? I am half thinking of "stealing" Slackware's boot disks and customizing them. I am not sure if that's out of my league, both in time and skill. I'll let you guys know if I come up with anything.