... I discovered the RAM dock exchange
program for certain powerbook models.
Are you referring to the lower memory slot issue? (I searched Apples site and Googled 'RAM dock exchange' and couldn't find anything). If so, unless your system is covered by the Apple memory slot repair program, you can either put a 1GB RAM strip into the working slot or pay for a new logic board. A number of people have chosen the lesser expensive route of using 1GB instead of paying for a new logic board.