Multiple 192 x 64 KS0108 Displays using OpenGLCD library?

How can this be accomplished? Because of the global instantiation of GLCD, there doesn't seem to be an elegant way to accomplish this without a lot of modification to the library. I am using an Arduino Mega 2560 with an ERM19264-1 series display I bought from buydisplay.com. The LCD uses 3 chips and 3 chip selects.

Thanks

Would it be possible to simply make the library think its a larger display, like perhaps if I need 3 displays, can I make a custom config saying it is a single 576 x 64 pixel display with 9 chip selects?