First, download UoFiddler
Then click on Plugin -> Manage -> Select MultiEditor and close and reopen UoFiddler.
Second, go to the new Multi Editor Tab (Last last one)
Then choose your multi size, make sure to click the grid display button and start drawing your building
Third, you need to save it in the multi.mul
Go to the Multis tab and select an empty slot (right click and select show free slots, free slots are written in red) return to the Multi Editor Tab. Click on save and write down the number of the empty multi slot.Leave the Export field empty, otherwise it will be not saved correctly.
Now, return to the Multis Tab, check if in the slot you have chosen there is your building, if yes click on Misc then Save. The files will be saved on a weird directory i don't remember the name(but Uofiddler will tell you where).
Fourth, put your new multi files on your Ultima Online directory.
Fifth, you have to put it on Sphere :
Add to a new/existing files the new item multi definition by using
PHP Code:
[MULTIDEF slotnumber] //Slot number in Hex not in decimal,so if you choose slot 163 it will be 0a3
DEFNAME = My_new_multi_defname
Name = My New Multi
Type = T_multi
MultiRegion = -3,-3,3,4 // the values of this Field depends on your structure size,
Resync etc
Sixth, adding the multi in game,
For adding the multi in game, just write .add multidefname
That should be all, even if some parts (scripts side) are not covered