Actually, after looking a bit more into the problem, I found the CD/DVD drive is probably not faulty! I plugged in an external lightscribe drive that had no problem working on my dad's computer, but had the same problem as my internal CD/DVD drive. So, maybe it's drivers, but my sister has the same laptop hardware wise (it's CD/DVD drive works) and we both have the same drivers with the exception of c:\windows\System32\Drivers\GEARAspiWDM.sys (I have that file, she does not). I'm not really sure were I got that file, though...
I've been trying to find the location of my drive's firmware update site, but I haven't been able to find it. I'll look some more...
Thank-you to everyone who has replied, you've all been a big help!