integrated video controller m-board and persistent image

[littlebigman]

i have no video card, just integrated intel video controller. intel 815eea chipset. at boot i type:
knoppix vga=0 3
wait for the prompt then type:
modprobe intel_agp
init 5
to make screen readable.

when i boot from a persistent image the screen is again unreadable.
is there a way to put that modprobe command into the persistent image?

thanks