Ok I have a printer conectted to the USB port now in queue type it says /dev/lp0 but I know thats not what goes there cause I've made it work with fedora before and I think it says something like /dev/usb but don't remember what else.
Can someone help me???
-Thanks

I'm not sure if I can be of any help but here goes ...

I have a USB printer as well (HP DeskJet 656c), it was detected when I installed Fedora, but to change it again here's how I do it:-

1) [Main Menu Button] -> [System Settings] -> [Printing]
2) Delete any broken printers
3) Click [New] then [Froward]
4) Give the printer a queue name
5) Select [Locally-connected] and /dev/usb/lp0 (or [Rescan Devices])
6) Press [Froward] and select your printer, then [Forward] and [Finish]
7) You can then print a test page to see if it worked

I hope this works.

Yes It works, very helpful