TAdvSmoothTileList width?

is there any way to assign specific width/height to each tile in TAdvSmoothTileList?

I'd like to have a 2x2 tile list (4 tiles total)
On the top row, one tile 300x50, the next one 150x50
On the 2nd tow, one tile 300x70, the nex one 150x70

Is this possible or each tiles share the same dimensions?
Thanks for any help.