but what i want to know is how i can transmit and/or recieve data. can i directly use the SBUF or do i need to send bit by bit when synchronizing the databits??
Evidently you have absolutotally no idea how the '51 works.
In links <--- you will find links to the 'bible' chapters 1 and 3. Read that and, if then you have questions, come back. If you intend to program in assembly, read ch2 as well.

Erik