6th_hokage said:is it possible to update from 3.2U straight to 4.1 U? BTW what is LU64+? is it serial number? thanks dude.
You at least need to have an IOS60 installed first to update straight to 4.1 with Waninkoko's updater so you COULD just use dop-IOS to install the most recent IOS60 and then run the updater. Or you can just run Waninkoko's 4.0 updater first and then his 4.1 updater. (Either way you do it you should have a cIOS installed first.)
Yes LU64 is the first 4 digits of the serial number of the wii. Generally Wii's with serials of that number or higher are boot2v4 Wii's which CANNOT be downgraded in ANY way aside from IOS15 with the Trucha Bug Restorer. Serial numbers aren't a very good indicator of this anymore however because lower serials can possibly be boot2v4 Wii's and higher ones can possibly NOT be boot2v4 Wii's. The best thing to do is if you bought your Wii anytime this year (in 2009 at all), assume you have an LU64+/boot2v4 regardless of what the serial number is.
Actually the best thing to do is treat every Wii like an LU64+ Wii because you can still do anything on those Wii's as older Wii's provided you use the right methods aside from being able to install bootmii to boot2 (which you should do if you can, and in that case you for sure wouldn't have an LU64+ type Wii.)