can i get the hbrew channel on any firmware??
and can i use any other game that isnt zelda?
No, but you probably could use WAD, which isn't recommended by me by the way. you could always just rent the TP game and delete the TW hack afterwords.
You need Zelda TP and yes it works on any firmware version. System menu 3.3 requires version 2 of the Zelda hack.
check out www.wiiibrew.org (http://www.wiiibrew.org) also its a good resource for anything HBC related.