How do I upgrade to the new software RAID?

[Scott Thomson <scott.thomson@cim.com.au>]

Hi
I am running Debian 2.1 with Linux 2.2.12 and the old software RAID in
personality 5. I've been told I should upgrade to the new RAID to take
advantage of autodetect and persistant superblock, etc, especially since
the root parition is a md. 
What is the best procedure to upgrade? 
I am prepared to compile any kernel (even 2.0.x is it is best), and apply
any patches. 
Do I need to compile raidtools2 against libc2.0, or should I get libc2.1
and just install the raidtools2 deb?

Thanks in advance.

Scott Thomson