If you can read instructions the installation of the radeon9200 should be easy
I say "should" because I have two mediators and in one of them it seems to be impossible to install the radeon card that i'm trying to use, the best i can get is to get it to display the testdisplay and then crash. On the other mediator the installation was easy as always.
If you want a cheap usb sollution it's pretty easy to find spider usb "clones". They are working pretty well but is somewhat limited because they won't function right after powerup because they need the mediator drivers to get initialized.
