software for making a model of a protein

[Mr Urpradiap]

Dear NG.
I am looking for a graphic tool/software to make a model of how I think 4 
domains of a protein resides together in the overall fold of the protein. I 
am not looking for an advanced tool to make docking of proteins or any other 
calculations on how the domains could fit together. I am simply looking for 
a 3D graphic tool where i can build my hypothetical  model (publication 
grade). If I was good at paintshop I would have made the model from the 
ground here (but I am not). I have the four domains as PDB files, that might 
make things a bit easier?
Thank you.
Ugi