[gmx-users] About free energy Methods for Memebrane-protein Calculation

[vidhya sankar]

Dear Justin ,
                      Thank you for your Previous reply.
I am Doing Simulation of assembly of  Cyclic Petide in POPC membrane
For that I need to calculate Free energy for Stability of Assembly. Normally Membrane Tutorail Does not contain Free Energy Calculation.
So which Method is Suitable to  study this kind of free energy
Is ther is Any suitable Tutorial ?
Also Parallely I am running  on Namd 

I would Loke to Convert .dcd files of Namd to either .Tpr or .Trr files of Gromacs for Analysis purpose 

 Is thers is Any Script,or  Server or tools Available for  this?