[ccp4bb] validating a homlology model

[Careina Edgooms]

Dear all
What programs are best used for validate homology models? I know of molprobity 
but if there are no coordinates I cannot use it. Is there a way to use such 
programs with homology models?
Also I wish to use pdbepisa for to charaterise dimer interface but again for 
homology model this cannot be done as there is no PDB model. Does anybody know 
way to use PISA software on my own model that is not deposited in PDB?
Thank you in advanceCareina