Probably I found. Following the instructions on "no there there" blog it instructed to rotate along the Y axis for aligning it "correctly". Apparently this hint is not more needed. Without rotating it texture appears ok, even if I found myself a bit confused on how many textures can be on the meshes files, since it appears that realxtend limits to only 16 submeshes.. Moreover, I don't understand if I just have to apply the textures in order or if I should guess which textures to put on each "material" handle :( anyway, I'm pretty happy with this now :)
-- http://groups.google.com/group/realxtend http://www.realxtend.org
