Those textures are 1024 and 512? Man they look like 128x128 and 256x256.... Definately no reason for large textures like that with the amount of detail you have there.
What interesting texture sizes (I think that is what the arrowhead symbolises yes?) Why not go for the time tested and computational optimized 512, 1024 and 2048?
I complete the texturing, a few hours over it and it will be done, here is my WIP, C&C's are welcome ^^ A 512 and a 1024 map are used for the whole model