you can connect it like shown here, but with one more diode for roughly 3 Volt:
http://ulrichradig.de/site/atmel/avr_mmcsd/gfx/MMCSDSCH.JPG
(thats actually for a 3,6V MMC/SDC card, but the interface is the same, SPI Bus...)
be carefull when soldering, the metal spring-contacts are really tiny. here's info on how to take the LCD apart from the phone: http://serdisplib.sourceforge.net/ser/pcd8544.html
I'll try massio's code soon, too. If it won't work, I've allready made a C code for msp-gcc that could be easily ported. I got my displays also very cheap (as replacement parts, it's the same for nokia 3310, 3330 6210 etc., see link) from ebay.