Pro Tools question

[KathyMac!]

I don't know if this is a profoundly dumb question or not but here goes:

I've been using Cubase since I started and haven't played too much with 
the other big apps (mostly because when I did look at them in the days 
of OS 9 I didn't like the interface as well so I never pursued them 
further).

Trying to expand my universe a bit, I've been thinking about testing 
Digital Performer 4.0 and also Pro Tools 6. A colleague of mine who 
works at Eventide just got a Digi001 in trade for another piece of gear 
and is really enjoying it. He gave me his Pro Tools CD to play around 
with on my G4 MDD Dual 1Ghz . I installed it and got the error message 
"could not create DAE deck" or "could not find DigiDesign hardware".

Does the PT software really only run with PT hardware?? My MOTU 2408 
isn't good enough for it? Will it not work unless I buy the Digi001 
rack box or the Mbox? I guess that's how they could efficiently stop 
the "loaning" of software and I suppose it would serve me right for 
using my friend's CD in this case (but I really didn't want to spend 
big bucks to only test the waters).

But is it true - will I need the $500 -$1000 hardware pieces in order 
to run Pro Tools and will it really not utilize third party hardware 
such as the MOTU interfaces?

Kat