Ok here’s the trick: For MegaUpload, put the following in Google:

Video files:
avi|mpg|mpeg|wmv|rmvb site:megaupload.com

Music files:

mp3|ogg|wma site:megaupload.com

Programs/Applications files:
zip|rar|exe site:megaupload.com

eBooks files:
pdf|rar|zip|doc|lit site:megaupload.com

For Rapidshare, put the following in Google:

Video files:
avi|mpg|mpeg|wmv|rmvb site:rapidshare.de

Music files:
mp3|ogg|wma site:rapidshare.de

Programs/Applications files:
zip|rar|exe site:rapidshare.de

eBooks files:
pdf|rar|zip|doc|lit site:rapidshare.de

Note: For MegaUpload and Rapidshare searching, narrow down you search for what you want by putting your query at the first part. Say if you want to search for Windows XP tutorials in Rapidshare use the query: Windows XP tutorials pdf|doc|lit|rar|zip site:rapidshare.de