This post here has a list of most common fields and some brief descriptions on how to set some of them.
http://www.eqemulator.net/forums/showthread.php?t=25552
If you are asking about NO RENT setting for 0, 1 or 255, I believe 1 is rentable (not NO RENT). Here is a post that mentions it:
http://www.eqemulator.net/forums/sho...highlight=RENT
Look at the second post on that page from ChaosSlayer. His info on it should be correct.