Holy Sheol, it works!
Installing the newest PC Suite probably fixed the cable connection drivers, so now I can actually browse the phone memory AND access the memory card from ex. Music manager. Now all that's left for me to do is transfer some music and hope that the phone properly refreshes my Music Library without making the device explode :P
Thanks, sendsmsdad, I love you, REPS FOR YOU!!!

EDIT - Yeah, it completely works now... Thanks a lot sendsmsdad