You mean i have to create new diffuse maps for the lowpoly mesh? Cause i have no idea that i can bake a diffuse map, i always thought baking is just a process for normal maps...
I mean the diffuse textures, if you buy a 3d scaned character, they are also full textured, skin, eyes etc... but this textures are aligned to the HP mesh and not to the shrinked LP version of the character... So i'm not sure if the old diffuse maps with skin color etc... will fit on the new self created skrinked mesh....