Hi Jason,

If you are using the 232 chip you must use the charge pump capacitors (0.1µF or 1µF depending on the chip) no mater how many circuits you are using from the chip.

If you want a “dirty, cheap” way out, look up the SERIN and SEROUT instructions (or variants of it) in the PBP manual. Only one resistor will do the trick. You just have to change the inverted/noninverted mode depending on your choice instruction to be used.
I use it all the time in my development stages and some times I leave it in my final version if the serial communication is not a life or death situation.

HTH

Nick