how do i use a macbookpro with a thunderbolt display and have an external projector

I bought the latest macbook pro with a 500 gig solid state drive 8 gig ram etc and a thunderbolt display, is use it with lappy lid down and external key board and mouse, so like an imac or tower. i want to add a matrox 3 display splitter in line to have 1-3 projectors for film and vj etc.

i can add it straight out of the lappy as one would expect, but now i find after vast expense i can only add another thuderbolt display out of the display port on the thunderbolt display!.

This is such a scam from mac.......what are they playing with. Is there any good solutions out there. I spend alot of money and can cant use projection and a thunderbolt display at same time......very disapointed on this one.....its a postitive backward progression on there part.....

its fine on the road, but doing mxed media presentaions from my work place is now not possible with my lovely big display as well.

there must be a away round this.....Am i being dumb.😕

thanks for any help in advance.

cheers