That circuit uses a Level converter chip to convert from RS232 levels to TTL levels.
You could just as easily buy one of these
http://www.ebay.co.uk/itm/1x-USB-2-0-TO-RS232-Converter-UART-TTL-Serial-CP2102-For-Arduino-UNO-ATMEGA-PIC-/320923619625?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item4ab889d129
and connect it to the Tx and Rx pins as shown in the listing, not sure about the reset circuit, you may have to do that too.
At the end of the day, its a messy hack really, cut your losses and salvage the processor for other projects or make your own Duino on stripboard or breadboard, its easy to do.