[ixp1200] Question about packet generation program

I have analyzed and modified PktGen application of VERA project. But I am something confused. In that program, packet is actually transferred? I think that header information of simple packet which is made at PktGen application is not enough. Namely, IP address is just 10.0.0.1 and MAC address is just 00:00:00:01. If I want to transfer packet to real system(ex. another linux PC), I would change these adresses? Plz give me answer or any hints. Thanks!