How can I flash ClockWorkMod on my Samsung Galaxy Fit running froyo?
This is what I ended up doing, just in case this might help someone else:


I tried flashing CWM 5 for RFS file systems via Odin. It's actually straightforward, and then the phone reboots normally. However, trying to get to the recovery mode fails. (I'm not sure how exactly, but it wouldn't work for me, I think it hanged at the recovery screen with android written on it).
(I freaked out) Then I downloaded a stock ROM (indian, based on 2.3.6) from samfirmware. Flashed it through Odin again. The device reboots (and takes some time) and you're on 2.3.6!
Then I flashed CWM 5 for Galaxy Fit (also from Odin) from the forums. It went smoothly. It will also boot into the stock ROM, and into the recovery.
From there, I didn't really try to do a Nandroid backup. (I supposed it would fail).
Then I formatted /data, /cache, ... Then moved the update zip file (the ROM) onto the SD card. And from recovery, installed it.


It's really not a big deal, if you're worried as I was. A simple backup of all your user data and apps via TitaniumBackup or similar, and your contacts synced to Google or exported to the SD in csv format, and you won't even feel the transition.