how-to block ads
The best way is to use the "link sites", which can be found in the eDonkey Guide
The forums at Sharereactor and Filenexus are also a valuable tool. You can search through there for anything you can think of and if you don't find it make a request.
Jigle is an external search engine where you can look for a specific file.
You can also use eDonkey's own internal search but more than likely you will never use this feature since the first 3 will just about get you anything you want.