We have a c5501 and several other office machines that we try to connect to from several different workstations operating several different versions of windows and OS - good luck getting them all connected.
@Bishop, thanks for your help but those are for the C550, I'm looking for the C5501.
@arosetti, we had no problem connecting through XP, Vista & Snow Leopard. Let me know if you need any help.
I guess he pulled the driver directly from the machine.