Quad Vertical Pane?

Have you tried to copy+paste+modify an existing layout? They are defined within the key binding and menu files.

You can get the same effect by using ST2's multi-window support.

Drag an open file's tab from the tab bar to somewhere outside of ST2. When you release the mouse button ST2 will open a new window for that tab. You can then set both ST2 windows to dual-pane-vertical layout, hiding the sidebar with Ctrl+B in one of them if desired.

Oktay: That's cool. I didn't think about that one. It seems it's totally possible to have four or more panels in whatever way.

Joel: That option is out, because two separate windows of ST2 cannot share a project. I guess you can make two duplicate projects but that sounds dumb.

I'm actually using my "Horizontal Triple Split Pane Layout" :). You can copy it from here: http://pastie.org/1671076