Hi,
for some days I've pondered the possibility of creating a road set, but I've encountered some problems regarding plazas and roundabouts, since 6 is a bit too much for my non-functional brains. I'll come up with something, eventually...
if you want to contact the admins you just have to write a private message to them. but i dont think they'll respond because they are never online. your road set is great. if an amdin comes online he will probably put it into the system.
i say the best way to contact a admin is to visit them at home, force them to visit pp and upload all the beautiful things users created over the time...