Rapidshare & Megaupload

Is there nyway to search for some file on these huge networks….though i read it somewhere that its practically impossible to download a file without knowing its link..but still..i think there must be someway to do so…
and yeah 1 more thing can download managers be used with megaupload.com….i know rapidshare doesn’t allow it unless u have a premium account..

For searching your file use a bit of creativity . combine the names of both the file and rapidshare and google it. You will be sent to the page of original location, from here it is a pieace of cake.