Creating a new boot CD for DC7800

Okay i must be a slow learner here. Help!! I've downloaded the ZDM7sp1_IR1_HP1.zip and burned a boot cd from there. I can go into the cd and choose manual and get no errors but when i go in to search my server it doesn't connect and says cannot find image server. I'm assuming it has to do with the network drivers. I have tried editing the isolinux.cfg with the following parameters under the manual line but then i get checksum errors after burning the cd and using it to boot from. What am i doing wrong?

append initrd=initrd ramdisk_size=67584 insmode=e1000 newid="0x8086
0x10bd,e1000" vga=0x0314 splash=silent mode=2 CDBOOT=YES showopts

Thanks Aron