THUG PAL online on ISDN 64K and aother questions

[SurfDrifter]

I bought Tony Hawk Undergound and i read in the manual about the feature of adding your face on the game. I'm on ISDN 64K

I don't own an Network adapter, but i'd like to know if i buy one, will i be able to at least download my face? i know that most online games require broadband and that is understood, but could i at least do that?
Buy the way, what are the minimum requirements of internet connection for playing this game?

Also, if i buy a network adapter, would i be able to transfer my saves from/to the PC from/to the Memory Card or do i need another gadget?

Also, for keyboards. Do i need an explicitly PS2 USB keyboard or ANY USB keyboard would work?

Thank you