Edit Tibia.dat ^^:
1) Add floor what you need (using example. Noxitu Item Editor [its good dat editor])
2) Put attributes to floor (Top of item 2)
3) Go to items editor
4) Load your items.otb
5) Click -> Create missing file items
6) Replace items.otb with your old items
7) Add line of item in items.xml
WARNING - if you edit tibia.dat you must upload your client for all OT Players.
Thats easier way to get new floors, items, etc...
If i help rep+