I don't use links provided by tomtest. I've actually downloaded their MCG. Created a bookmark in mozilla using this javascript
[Please Register or Login to download file] . Once I'm in the download page,I add in the premium cookies I copied from MCG thus making me a premium user. The only catch is that you do not logout and never clear your cookies. The best part, you only need to do this once and you can continue downloading as premium user.
p/s I don't use IDM but mozilla addon DownThemAll is the best so far for filefactory