so have you got the time to Identify your Wii / the chip on your dvd drive?
there you put in the Wiis serial no. if the result tells you you have a D3-v2 or D4 chip you won't be able to run any burned disc at all with that wii.
there is no need to delete the softmod. if you want to change something, do it with caution and you would just install stuff on top of the old.
if you want to start over the guides from mauifrog are just superior to anything else you find on the net (also not recommended to use anything else then this site especially youtube stuff, or sites praising pimpmywii or something)
if you reword your question a little and tell want you want to accomplish we can find out what a next step would be. i think you just have a drive which isn't able to read backup/burned dvds.
maybe you want to Get WiiMC as it has nice features like streaming videos to your wii from a shared network folder on your pc for example