With Falko's tools down, there is no way to properly create 2x2 units. Cutting them without the aforementioned tool is nearly impossible. God Bohemond, could be possible to add the option to create large units on your tool?
Many 2x2 unit sprite sheets found on the OpenXcom forum are in the easy to edit template format that
Falko's Tool used, it would be most appreciated if you could make UnitSprite Studio compatible with their formats.
I happened to save all of the 2x2 unit templates used by Falko's Tool before it went down.
Hopefully these will help:
Drawing Routine 2 (Tank & Hovertank)
Drawing Routine 3 (Cyberdisc)
Drawing Routine 5 (Sectopod)
Drawing Routine 5 (Reaper)
Drawing Routine 11 (Coelacanth & Displacer)
Drawing Routine 12 (Hallucinoid)
Drawing Routine 20 (Triscene)
Drawing Routine 21 (Xarquid)