Superdrive in a powerbook

i bought the 12" powerbook that was for sale here, and like the seller said, there are some problems with the combodrive, it dosn't accept CDs a lot of the time, i was wondering if it would be worth $200 (otherworldcomputing.com) to upgrade to a superdrive? However pbfixit.com has a walkthrough on how to install the superdrive, and it looks really hard, i don't have much expirience and i don't know if i should even risk it, i was also looking into replacing the bottom peice of the case, but that too looks very difficult and the cheapest one i've found is $200, can anyone make any suggestions of what to do, thanks!