Not hard at all. Just follow the datasheet for the WS2801. I have a similar "pixel", but with (up to) six 5050s. I say "up to" because you can also run it with just three. Basically on the board, I have traces laid out for LEDs 2, 4, and 6, shorting the anode and cathode pins. If I want to use those LEDs, I just cut the traces and solder the LEDs on. So by default you start with three LEDs in a triangle configuration. If you want all six, cut the traces, and add the remaining three.
NOTE: My schematic is based off of the 5050 RGB LEDs which are 20mA per channel (60mA total). The 5630s are 100mA, SINGLE channel LEDs.
