ocdetective

Thanks to wanin's firmware and users acting like lemmings I think you will be quite busy then!

I am sure there are plenty of forummers who know exactly what you need......
Hint - what you need and what you want are entirely different things.

Sorry that you are getting the generic "faulty disc", Use DVD -Rs, check your burn etc etc type of replies. Obviously people are not reading your actual messages. To truly eliminate disc/burner as an issue I would suggest you re-burn a game that you have already burnt in the past and is still working fine and see if it plays.
Thing is Neogamma is better suited to a base of 56 or 38 which I suspect was what your slot 249 was on originally (the readme for r8 recommends rev19 with a base of 38). A better solution would have been to install rev 20 with base 57 in slot 250 and keep your original slot 249 as it was. That way you could play problematic games such as COD BO using slot 250 and keep the status quo for previous games on slot 249. However I don't know if neogamma has the option to use slot 250! What you could do is re-install what was your previous cIOS revision into slot 250 if it does. Also make sure your options are set as per the readme eg no hooktype etc.
Other options would be to use loaders (if neogamma doesn't have slot 250 as an option) that allow disc loading and also have the slot 250 option. I use both cfg and GX and I merely installed rev20b to slot 250 with a base of 57 purely to play COD BO. I have USB loading but they both have a disc loading option too.

So reading between the lines the Wii did not even have cIOS 249 in the first place and was not initially trucha bugged either.

If you cant work it out, you could always still just use the installer but install it to slot 250 instead. Of course you would need to change the setup in your loader so that it loaded 250 and not 249.