I had all my PBs on ML with Chameleon. I migrated to Mavericks on all of them now. I used Clover EFI USB to perform upgrade, so I got Recovery Partition created automatically by installer on all my upgraded BPs during upgrade. Then I just installed Clover and configured it (as in guide) on all of them as last step in upgrade and now I have Clover boot loader and chameleon as a redundant backup in case something goes wrong with either of boot loader I have a backup option right on my laptop.
Once you do first one, then it is "walk in the park" as you can just re-use, DSDT (Chameleon), config.plist and update serial with yours from Chameleons smbios.plist, so the serial is consistent on both boot loaders. And last touch is to update UUID so custom entry is picked up by Clover.
BTW, I didi not need to hit F9, as I had only USB bootable in EFI mode, so it booted automatically to USB EFI (Clover). I only needed to do boot option override (spacebar).