Group dx9 order.... any matrix?

vvvv beta general
1

hum…
i m puzzled around this little thing:

I have 4 DX9 quad in transparencies with png

how to remote wich one is in position 1, wich one is on top in position 4 , and to change them ?

is there a matrix, a GetOrder node ?

2

Group (EX9 Priority)

3

merci ! ;-)