The updaters look for the version string without any regional qualifiers (at least from my experience). Methinks you'll be safe if your Wii is up to date - and if the relevant update has been released in your region already.
Thankfully you're asked before updates are installed.
Linkhero1 said:
Whenever I try installing the unofficial update for the shop channel I get errors and a code dump. Any help?
Could be one of many things.
Bad SD card - try another (no SDHC) and/or do a fresh format with the official SD card tools mentioned on wiibrew.org
Interfering peripherals - take out any NGC memcards
Broken download or messed-up filesystem - redownload, take extra care to unmount, make sure the card isn't write-protected
Leave some space on the SD card in case the updater needs it, and don't use that little switch thing to write-protect your SD card.
That's all I can think of right now.