Welcome, Roger.
Glad to have a GTO, we're a little heavy on the Camaros. lol Have any pictures?
As for the different types of members:
Supporting Member - Forum member who has made a donation to Lateral-g to help pay for the operating costs.
Junior Member - 0 to 19 posts.
Registered Member - 20 to 99 posts.
Senior Member - More than 100 total posts.