It's strange for it to brick itself. Did it freeze during play or was it off a reboot?
Anyway if you can load HBC you can load Wad manager and just could re-install System menu 4.1U and you should be back up and running.
Another Bricker found the following webpage with downloads of System Menu wads Wads
According to google 4.1U is v449 which resides almost at the very bottom of the page. Make sure you get the RIGHT one for your area and CHECK yourself on this so you don't come back blaming me.