I got it to work under these configurations for the a1020n HP:

iDeneb 1.4 (10.5.6)
Voodoo Kernel
Seatbelt Patch
ICHx Chipset
No sound / wireless kexts; can be installed later

The problem now is that these don't work:
ALC880 (sound)
INTEL 915 GMA (graphics)
Realtek RTL8101L LAN (ethernet)
zydas 1211b (wifi; I need help for this actually, can someone explain how to install this one, it detects it as an ethernet [I used the zydas driver from ideneb])
16x DVD(+/-)R/RW DL LightScribe drive (DVD; need desperately for this to work)

EDIT: the dvd drive is a LG gwa-4162b