Dell DVD Writer

[qanda]This thread is about the DELL Inspiron 1720. Click here to see full specs[/qanda]Two questions in one really;

My DVD writer seems to not be able to read certain discs, e.g. my sons HP laptop can load a couple of games that mine claims to not be able to read.

Now I know DVD writers do wear out, even ones just over a year old, however I have read that you cannot just swap out the DVDRW drives on Dell notebooks. Is this true because it looks pretty standard.

Can anyone recommend a slim DVDRW preferably with lightscribe that is available - I think its a SATA drive but I’m not sure until I take it out.