Modification of the Extracted files (Through Cadence tools)

I am working on CMOS 65nm 10Lpe process from IBM. am using cadence 616 and I want to change the resistivity of M1. 

The extraction tool is Calibre from MG but the extraction files are encrypted so I am unable to change them. 

I was thinking if there is a CADENCE way to resolve that. One thought I had is to change the lumped resistance/cap values in the extracted file in an automated way to account for that. Yet, I am not sure if the extracted file is a cadence of MG file and whether what I am saying is actually doable or not. 

Any thoughts or suggestions will be appreciated.

Thanks