BTW, if your model is a 13" Late 2008 MacBook you can go for the 13" MacBook Pro 2009+ glass. It fits, and you're old Mac will get a fun cosmetic upgrade :P

I totally agree: if your glass is broken (a good reason why you may be looking how to change it) you'll have to be VERY patient. It is very likely that the glass will break in hundreds of tiny pieces while performing these operations. My experience says: 1) Heat the adhesive thoroughly to minimize the work. 2) Go fetch some glasses to protect your eyes. 3) Good Luck! :)