recipe for LVM1 -> LVM2 on a stock FC1 system?

[Robert P. J. Day]

  i've been going over the archives on both the FC1 and LVM mailing lists,
and it's still not completely clear how one can take a stock FC1 system 
with an LVM1 layout and upgrade that to LVM2.  that is, keeping all else
constant, including the kernel.  (moving up to 2.6 would be an independent
project, after this part is done.)

  according to some archived postings, the first thing one would do would
be to patch and rebuild a kernel with device-mapper support, for which
there are patches at ftp.sistina.com/~thornber.  that sounded reasonable
except that the 2.4.22-based patch set there doesn't patch cleanly against
the 2.4.22 (2115) version kernel that comes with FC1.  in fact, there already
appears to be some level of DM support in the kernel source tree, so i'm
unclear on what (if anything) needs to be additionally patched before going
on to build and install LVM2 support.

  in a nutshell, is there a recipe for taking a stock, LVM1-based, FC1 box,
and moving up to LVM2?  while changing as little else as possible, and
still being in a position to upgrade to the 2.6 kernel afterwards?  given
that the first step of patching the kernel for DM support doesn't really
work cleanly, i'm leery of pushing forward until i know what should 
have happened at this step.

rday