Lindows and Wine have nothing to do with it. The OF/BIOS/whatever you want to call it has one job: initialise the hardware so the OS can boot.
OF is in Forth. PPCBoot is in C. We know that the implementation of PPCBoot on the A1 includes a x86 emulator. We know nothing much about the Pegasos OF, which is why I keep asking. I haven't seen a straight answer yet (maybe that's the Thindick influence) and I don't think this excessive secrecy about the mobo bodes well at all.