i put my pencil sketches into my computer and i want to open them with rhino so i can draw them on rhino easier, if thats possible. how do i do that?

Here is a tutorial by The Rain Knight:
TT modeling tut
The first couple of stages explain how to get blueprints/pictures into Rhino.
PS: The rest of the tut is comonly known as the best car tut for Rhino

thanks for the tutorial as well, but now i figure that the trial version doesn't have all the options. any way i can get the full version without paying $800? :]

hmmm lets see.. there are several ways, but none that is on the narrow road(legal), so they are none advicebal.
There might be some kind of student license.