You need to force the computer to boot to nic. Imaging can't be done inside of windows, not with the imaging job at least. If you dont have PXE set up, youi can always use a boot cd, just make sure you leave the imaging job as "default automation" the same goes for if you use an automation partition.
I have the BIOS configured to boot from the NIC. I have also hit F12 to access the network boot but, this will not work either. I've even rebuilt our Altiris boot image on the server to use the specific network adapter that the laptop has but, still no luck. I have imaged other HP models using this same method (right-click on the pc and choose "quick disk image") Is there another method in Altiris to create an image of a computer?