ATMega8515 core for AVRISP STK500.

I am currently trying to use the Arduino IDE to do some programming on Atmel MCUs.

While waiting for some other boards to come in I would like to try some code on the ATMega8515
that came with the STK500 ISP. I am having a hard time finding the applicable core to do so though.

I was hoping that someone may know more about what version of the core is available and what version of the Arduino IDE I would need to download to run it.