Those "guides" you found, read them and post your questions in there. Theres alot of threads also dealing with the upgrade. Yes youll lose starfall because starfall only works on 3.2 firmware. I also dont think preloeader works on it either. You can still use a wii without brick proection. You just need to be careful what you do. The only way youll get a true brick (other than banner bricks) is to pop in an out of region disc and upgrade. That will 100% brick the wii. I currently have a 3.2U wii. I can go into system settings and force a nintendo upgrade which will upgrade me to 4.1. That wont brick my wii but ill have alot of headaches with the fact that not all of my homebrew will work, my games wont work because they are all scrubbed copies and 4.1 doesnt support scrubbed games. Just read the tutorials, understand them as best you can, and then ask questions.