No, no you cannot sadly. The PS@ version has no way of doing that at all- as of yet.
If you have the internet wired to the PS2, I believe you can download them.
no
No
Unfortuately there is no downloadable content for the PlayStation 2 version of Rock Band.
yes, the ps2 rock band controllers are actually ps3 controllers but they are ps2 compatible
Yes!
Yes, you can. You can either do this buy purchasing expansion discs, or by ordering them on the internet.
No, no you cannot sadly. The PS@ version has no way of doing that at all- as of yet.
No, you can only buy additional songs if you have Rock Band for the Wii, PlayStation 3, and Xbox 360.
No it was not released for the PS2
The rock band controllers will work for both PS2 & PS3.
Rock Band games on PS2 only support PS2-style guitars and PS2/3 Rock Band guitars and drum kits. Guitar Hero: Aerosmith and newer on PS2 support all instruments from all consoles that the games have note charts for (so no drums on GH:Aerosmith but 360 and PS3 drums work on all full-band GH games).