The Aquaero version 4 firmware natively supports both LCD and VFD displays. The LCD's used by Aqua Computer are made by Crystal Fontz. Now from trying to decipher your post am I getting the idea that you bought a Crystal Fontz display from some one else correct? You somehow want to interface it to use an Aqua Computer software program correct?
I don't know what model Crstal Fontz display A-C uses in their products. If you can get that information then you could go to the
Crystal Fontz Forum and see if they can help. I don't think it will be a problem for the Aquaero LT to use your display, but just where do you live? The main issue is getting the connector harness to fit the display you got. I would suggest you contact Chris Moeller at A-C who does the English support and see what he can come up with.