Bosch Motronic DME Programming

A friend of mine just expanded the displacement on his 5.7 Camaro. He's got a lot of experience adjusting fuel mapping and so forth, and I'm considering expanding my displacement (M50B25 non-vanos) to 2.8 liters with a guide I found at a german site. Unfortunatley, to work properly, that requires reprogramming the mapping on the ECU. I've heard of JimC's DME reprogramming software, but can't find it anywhere. Are there any other solutions? He can't redo my maps without a software to do it with :(