Re: skipping mp3 discs
The REC isn't worth the upgrade. It's entirely obsolete. As for your issue, you should enable the function on Nero to verify the disc AND make sure to disable multi-session burning, ensuring that the disc is finalized. I've also found the the player will only recognize files in the root directory plus one level. So if you try to burn nested levels of directories, it won't find the files. Once you follow those steps, you'll take out the variable of your CD burner.
As for the player, why not try one of those old fashioned "lens cleaner" discs where it has the brush for the laser lens. Can't hurt to try. If it is indeed the lens, you're probably SoL and should put in an aftermarket unit for replacement.
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