How can I set up my G4 for wireless?

Hi!
I've got a mac g4 tower and am not sure if they have ready installed airport cards or not. My questions are -

1. Does anyone know if it would have? And if not, are they easy to install? 2. Would a usb adapter do the same job, if I were to buy a cheap mac compatible one.
3. I'm trying to connect to a tiscali wireless router. Tiscali was compatible with a regular modem - do you think it should work with wireless also?

Many thanks!
J

No it will not have a built in Airport Card as standard. FW800 models, the last made, do have built in antenna etc. for Extreme Card, but you have to purchase separately.

Do not go the USB way, choose a mains power router and sorry can't help with Tiscall.