Like so: <A target="_blank" HREF=http://www.tractorbynet.com/cgi-bin/compact/showflat.pl?Cat=&Board=custom&Number=33465&page=0&view=collapsed&sb=5&o=2&fpart=.>Click here</A>
Go to the post a message page and click on the link for "markup". Basically, it's Left Bracket url= before the address, Right Bracket,then name the link (ie, "Click here") and put /url in brackets after that. The brackets are the lower case keys just below and to the left of the backspace key, the square ones, not the curly ones.