Your right you can of course, from personal experience the data path is more stable if the installation is critical. The worst thing that can happen is projector loses signal and all goes blue. Just a hint you may already know : Inside most projectors you can set the default colour to different val...
Also you have to think about : DP / DVI / HDMI are digital Signals, if you adapt to VGA ( Analog ) then you might dont see anything. I dont think it will work this way becouse of this D/A problem. But try / error is possible ;) My guess: You´ll need Digital -> Analog converter ( 8 of them). And here...