If you put together the schematic of post #7 and the usbasp_devre.pdf file inside Devre_Sema folder of the attahced rar in post #12, then you have the PCB. I agree that showing three MCUs instead of a 40 pin socket in the schematic is kind of confusing. Since he chose this representation, he should have included one more MCU with 40 pins. This makes it even more confusing. Finally there is a hex file for ATmega48 which seems to have no use. It was nice of you Alex to sent a PM to Gevv, I think maybe he could clear things a bit.
I cannot swear that the hex file and drivers are working perfectly, but the project (together with the uploaded gerbers) seems to include all the necessary parts. It is now this thread's OP responsibility to start this project or not. The reference is still there. In any case googling didn't gave so much results on this, so due to the lack of references, I still think it worths a try. Let's not forget that the original post was focusing on schematic only and at the end much more things were provided (hex, drivers, gerbers).