months ago, when i backed up my unreal 2, i had a LG burner... no combo drive - combo drives are known as not so good readers - for example in the sony vaio laptop of my girlfriend there is a dvd-rw/cd-rw combo drive and even in the manual is written that those drives have more problems reading cd's than normal drives - especially if the cd is a little more scratched...
but the point is that months ago i used bw 4.2.5 (yes, the good old version which, in my oppinion, WAS the best for twinpeak copys without autoplay) to copy that game and it worked fine for me.
but i think you won't install that old version of bw just to copy this game?
just try reading it with on another computer... this might help since it looks like a prob with your hardware...

greetz,
Raz