Yeah I found I could do a use item target and then reset target for each one and just hit the number over and over to get it up.
It will take time to do a castle floor. This is making me rethink mine LOL
Option 1:
What I did was in UOAssist went to the Keys tab and for Features: Last Target I set the "key" to my Mouse Wheel by scrolling down. It says "MW Down" as the key. Once I had a piece targeted I just rolled the sucker until it was high enough even if I couldn't see it or had to run upstairs to go higher. You can even turn your mouse upside down and run the mouse wheel across your cat, or your desk or your forehead*.
*Warning: you might look crazy.
Option 2: (Which is what you wanted in the first place)
If that isn't easy enough on the wrist then yes you can do what you are thinking of in UOAssist but setting it up takes a bit of time.
Get a stone paver and lock it down in the area you want to raise things say 1 floor in height.
Go to the macro tab of UOAssist and hit record.
Double click the house deco tool and target the tile.
Double click the house deco tool AGAIN and target the tile.
Repeat this process (using the tool again each time otherwise the server times out and eats it's own feet because it's confused) until the object is at the desired height.
Tab back to UOAssist and hit stop on the recording.
In the command window it should look like this.
Use Item
Target
Use Item
Target
Use Item
Target
Use Item
Target
Use Item
Target
Use Item
Target
For each Target right click it and change it to Convert to target last target.
It should now look like a bunch of:
Use Item
Target - last target
Use Item
Target - last target
Click on each Target - last target and hit the Pause After button on the left side and add a pause of 1500.
The final macro should look like:
Use Item
Target - last target
Pause 1500
Use Item
Target - last target
Pause 1500
Use Item
Target - last target
Pause 1500
Use Item
Target - last target
Pause 1500
Use Item
Target - last target
Pause 1500
Use Item
Target - last target
Pause 1500
etc for however high you want it to raise in 1 go.
You can then set a key to play whichever macro # you set it up under and viola you have a 1 button to press to raise up something multiple times.
The macro will never have to have the target reset since it uses last target. You can use a skill like eval or cast a spell on the object you want to move or simply use the deco tool on it one time.
The same macro can both be used to raise AND lower items. To lower something lower it once with the deco tool and it will keep going down until you reset it to go up.
If you find your macro is going too fast for your connection you might have to adjust the Pause up to 2000 but 1500 should work. I found at 1000 it was raising it only 4 times even though I had 5.