I change my resolution into the system preference menu, default is 1360x768 on my system and it's very ugly...

For drivers :

For audio : ALC888A driver.
For Ethernet : Realtek R1000.
For Wireless (Linksys WMP54G) : RALINK (this after 2500USB or something else)

Nothing works And I discover that FrontRow doesn't work too 'cause my graphical card doesn't support it (same for some screensavers).

Now, the good question is : how to change my drivers ?