From my recent experience, it makes no sense to host custom maps from this mappack at this time, unless you agreed to meet with a couple of people beforehand, who also have the pack installed.
When I was on, nobody had either heard of the pack, even some well known clans, nor were willing to join. I didn't check at TWN, but it appears they should advertise a little more and all serious clans should encourage their members not only to download it, but to actually use it as well...
Unless that is done, we will continue to see the same steppe and flatinland maps as always.