I think that the owner of the shop who modified my wii for me said that I can do system updates, but I have to use US discs to do it. I will do an update today and change the brand of the DVD-R and try again, I will let you know how it went. Thank you so much for your help!
I changed my DVD-R to verbatium and that seems to fix the problem I had during the burning process. I burned Dead Space for wii and it worked fine, but that is the ONLY disc i burned which worked, so now I'm confused as ever. How come the Dead Space worked, and everything else did not work. It either said unknow disks or corrupted system files. I thought once the system is moded, it can play all burnt games? I guess I will just try to soft mod my wii as OddGriffin had suggested. Any advices or comments on my weird wii experience or the soft modifcation would greatly appreciated! Thanks again for all the help and paitence!