When i started using teleporters I used WarpZones, a pre-made zone actor, just create a new zone by adding a brush and making it non-solid and make it a zoneportal, then add a Warp Zone to the other end, then connect it all up.
You can open UP3 in SDK, so as you can open every map in Hotel Carone, Cassandra, Zodiac, Redsun SP mods. These all requires just additional loading of required packages before openning the map.