i do have the driver file for one of the motherboard its a Lan_Marvel inside a intel board
as for the other one is a Nvidia lan so the driver is available also.
what i don't have right now is a way to build them to linuxmce, no kernel source and no way to do it so i will pause that for now.
one thing i can allways do is to get two 1GB lan cards that works, but none that i have do.
someone who have instaled from source can compile those and put them online for us
PS: i will post some post in my natural language (portuguese) in my own site http://rictec.homeip.net/forum
and get some help translating it