doh, the reply listed below is with regard to matchmaker.....i cant answer pushers query specifically re: using direct connect to server but i've never had a problem finding servers with direct connect, including ukdirts, but the connection data is part of the game itself, not the mod....if anything it may be a server issue, but this could only really be diagnosed by swapping the mods around on the servers.
anyway, regarding using the rf matchmaker list to find servers;
the powers that be are all busy, i'll answer instead - there is a line in the .plr file that relates to the number of visible servers in your matchmaker list in game - i'll post the line when i get home tonight so you can increase the number of visible servers, therefore the ukdirt servers should appear on first or second clicks (i think the rf matchmaker lists the servers by ping, so all of the empty servers showing 0 ping will get on the list, populated servers that are showing a ping figure get pushed down, so enabling more servers in your list blah blah etc etc)
i'll post the details tonight