Mr. Prahald said
"Whats so great about it All Atmel ISP micros need these five pins only. Its a IC property ISP software has nothing to do with this."

Then why do you think Mr. Craig Steiner asking this

"I want the SBC to be able to be programmed ISP by simply connecting a custom parallel cable directly to a 5-pin ISP connector. "

Even chip Manu ATMEL themselves supplying 10 pin ISP connector.
TRy using 5 pins with ATMEL ISP software , software will not work