As far as I know for linking - as long as it's not a virus ridden site/hack/crack/copyright theft/etc... - and is legitimate, it should be fine.
I know all of the websites I normally link are trustworthy (at least to me).
Here's a pictorial of how to take apart the laptop if you plan on putting on new paste:http://forum.notebookreview.com/asus-gaming-notebook-forum/475907-asus-g73-series-disassembly-guide.html
Also here's a nice video as well:http://www.youtube.com/watch?v=Tp90M_N6dzs
I feel embarrassed to say this but when I took mine apart I screwed up the keyboard/touchpad. So now it doesn't work. If I could find a cheap replacement I wouldn't mind putting it back to "stock" or better.