Wii 4.2U not playing games from DVD
So I already soft modded the wii and I am able to go into the homebrew channel install homebrews with no problem Im using Wiiflow and I can load many games from usb, I havent had any issues with that the only problem with my wii Im having is I cannot load games from dvd's which is not very good.
After doing some research I think that my wii has the drive that wont let you play them, the reason why I want to be able to play from dvd is becuase I want to play gamecube backups which I have done research on aswell and apparently you cant play them from usb backups.
So basically my question is what can I do to get the dvd drive to either work, whether its a software issue or could I find another option such as getting a modchip or an external dvd drive or something. ANY advise would be greatly appreciated in helping me with this I will be online pretty much all day and will provide any information needed if you are willing to help.
Also I have been unable to load wii and gamecube games from dvd's no matter which ones I try I have Phillips DVD-R and ive used IMGBURN which ive been told about on the net I have also tried verbatim which i have heard is great. So any help is appreciated guys! Im pretty stuck!