Userscripts.org

1. Download "Rapidshare Links Checker" script from http://userscripts.org/scripts/source/9467.user.js

2. Download the file http://www.wupload.com/file/2539585827/aab-grea... and extract the files at the same folder with "Rapidshare Links Checker" script

2. In Opera go to Tools -> Preferencies -> Advanced -> Content -> Javascript Options -> Choose "User Javascript folder" the folder where all 4 scripts are.

3. In Opera go to Tools -> Preferences -> Advanced -> Downloads -> Add
"MIME type" : application/json
"File extensions" : leave the field empty
"Action" : Open with Opera

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For "User Script Commands" press Shift+0
For configuration of the script press TAB+z
(thanks to ale5000, PythEch and dkitty)