[Chimera-users] Linking four proteins

Dear Chimera users, I have predicted a protein structure having 4 different domains (for e.g. 1-94, 95-247, 248-444 and 445-509 residues) and all are part of a single protein from 1-509 residues. They have been predicted from different web-servers. Now, I want to join them together to form a single PDB file i.e. make a single PDB file containing the entire protein from 1-509 residues from the above 4 PDB files. Afterwards, I want to run a simulation of the built structure. I searched in google for possible solution but not sure which method would be better. Is there any solution to build this one structure in Chimera? Please let me know. Thank you so much. Aditya