Hi Calco,
I think you may have a bit more work to do. From a quick look at the datasheet, the serial input to this display is NOT any form of RS232. It is a synchronous serial port. I.E. it needs a clock as well as data. There is no Baud rate as such. In PBP this means using the SHIFTOUT command.
You need to setup the display driver and then send in a 0 or 1 fro each of the 8192 pixels. This is 1KB of data! Most developers generate the graphics data using a PC program. The Lascar site had a link to such a program. The amount of data is such that you may have to use external memory to store graphics.
These displays are not accessed by simple text strings like the 16x2 alphanumeric LCD's

Not much help I know but I hope I've given you an idea of what you need to do.

Robert G8RPI.