Hi,
I am sent from coreboot mailing list to help make flashrom fully working on my Asus P2B-LS board fully work. When I did mine, I just forced ASUS P2B-F as the target and it works. No modification to flashrom required.
The flash chip on my board is SST 39SF020 and all operations work. Used this setup to flash coreboot several times while booted with coreboot.
Good news is the board enable for P2B-LS would be identical to P2B-F meaning a lot less work.
Cheers Keith