You must be more specfic as to what controller the LCD uses, but start off by looking at the timing diagrams for the LCD. If the R/W is one control line on the LCD controller, then usually the read is high and the write is low in which case only the write line from the uP need be connected.
You only need pull-ups on P0 if the LCD is not memory mapped i.e. you are not using a MOVX instruction to talk to it.