Hey viscera,
Brickblocker won't remove the channels, sorry. If you apply the brickblocker patch, the game won't run!
All hail Ninty, and their extremely annoying copy protection!
For PAL owners, the process for not having duplicate channels with SMG is the same as it was for MP3 (it would appear everyone has forgotten there were three steps)
a) Ensure you are patched to 3.1E via either online or using the MP3 Pal release.
b) Region patch the SMG backup to PAL. Burn to DVD. Do not apply brickblocker. Insert the game and allow SMG to apply patch to approx 10% then pull the power cord. When you reboot there will not be duplicate channels.
(If you do not yet have a compatible modchip the SMG logo will not appear in the game channel. Simply select the channel and then the after a short pause you will be asked if you want to update. After 10% pull the power).
c) Apply BrickBlocker to a new PAL patched SMG. Burn to another DVD. Now because there is partial info about the 3.1U firmware somewhere on your 3.1E Wii it will now boot the PAL patched SMG backup without trying to update.
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I have already completed the steps above ready for when openwii or wiikey (which can be run on openwii) release a modchip firmware patch. I do not have duplicate channels and I am now able to see the SMG channel, open it, hear Mario's intro voice, then get the famous "001" black screen error.
To recap, it is possible to perform a partial update to a PAL Wii and NOT get duplicate channels.