Created with Autodesk Maya 2011.
The download file contains:
guitar.obj
guitar.fbx
guitar.mb
guitar.ma
diffuse.png
bump.png
reflection.png
guitar.psd
The guitar is textured with a diffuse, bump and reflection map (2048X2048) with a proper UV-layout.
Photoshop file (guitar.psd) attached for changing/deleting the signature on the guitar.