Jim,
for cost effective is much easier to buy or to make your self an eeprom programer like Ponyprog… only you need to do this are some (few) electronic components and an soldering iron (I made myself hardware part and costs was arround 2 euros)… and after that download for free the software from “Lancos” ( http://ponyprog.sourceforge.net ) and it’s done…
Only problem is that you need an computer with serial(DB9) or paralel /printer(DB25) port…
P.S. At that address are also electronic scheme/diagram and PCB design too…