Note that I'll be moving this thread to the Scripting Department, seeing as this is the forum where one can share completed scripts with others.

No worries, though.
Custom House-script:
If you mean custom houses where the players can construct their house bit by bit as they choose, on a plot of predetermined size, then sorry, no such script (or code) exists for UOX3 as of yet, and there's no easy fix for that since it'll probably be a complex script to write.
World teleporter gump:
Try using 'SETSCPTRIG 5011 on your moongates, and you'll get a menu with locations to travel to when using it, similar to how it is on the official UO shards.
When placing new tiles in say Green acres ect. when you walk towards them you get tiles missing from it is there any way to fix this?
The issue with items missing when approaching from a certain direction is a bug in UOX3, I'm afraid. One "workaround" is to give players access to the 'RESEND command, which resends everything on their screen to their client.
World change gates... as it is right now i don't have the world teleporter gump so I've been trying to set a portal straight to Luna from Brit but it sends you to a secluded location thats not luna at all lol, if there is a world teleporter gump this probably is unnecessary but could be helpful to know
If you've tried using a teleporter of TYPE 60, then that's the reason why it's not working. Those teleporters are not usable for teleportation between facets/worlds at the moment, as it's missing a vital component - it's not possible to assign a "target world" to the teleporter.
You either have to use a JS-based teleporter based on the onCollide and/or onUse JS events (to cover both double-clicking & walking on top of the teleporter) - or setup teleport locations through UOX3\JS\TELEPORT.SCP, using the following format:
Code: Select all
(source) (target)
(ENTRY=x, y, z, x, y, z, sourceworld, targetworld)
ENTRY=1055, 499, All, 1055, 499, -90, 0, 3
The above example will teleport you from 1055, 499 in world 0(felucca), to 1055, 499, -90 in world 3(malas)
You might have to restart UOX3 for any changes to teleport.scp to go into effect though.