you just wanna look, the Reference Guide gives a complete description
of how the program is intended to work, including current screen
shots.
As I said, only download a play with this software if a) you're a
server admin running dedicated servers, and b) you have the room (or
a spare machine) on which to copy your sim folders (as backup).
All online-capable Papy Nascar sims from NR3/NL and later are (or
will be) supported.