We can search files with google, of course with a special code. Here it is...
1. Search Video Files
CODE : site:rapidshare.com avi|rm|asf|wmv|mp4|flv|mpeg|mpg|rmvb "TYPE THE TITLE OF VIDEO FILES YOU'RE LOOKING FOR HERE"
2. Search Music Files
CODE : site:rapidshare.com wma|mp3|ogg "TYPE THE SINGER, TITLE, OR ALBUM YOU'RE LOOKING FOR HERE"
3. Search Compressed Files (RAR/ZIP)
CODE : site:rapidshare.com rar|zip "TYPE THE FILE YOU'RE LOOKING FOR HERE"
4. Search E-book (PDF)
CODE : site:rapidshare.com pdf|doc|lit "TYPE THE FILE YOU'RE LOOKING FOR HERE"
PS : you can change rapidshare.com to any site you want such as mediafire.com, megaupload.com, or another site.
PPS : If you want to search files with a specific extension, you can change the italic word to any extension you want.
Actually, google has so many codes. This is just some of them. I'll update if i find another useful codes.