I'm working with PGSTAT 128N and Nova 1.10 software. I'm guessing that they don't differ that much. After you have obtained the experimental measurement, you go to "View"-->"Analysis view" and you select by double clicking your measurement in order for it to appear at the view window. Then you right click at the procedure that you used, you select "Add analysis" -->Fit and simulation and you select "Edit" on the left hand side of the plot area to open the equivalent circuit editor window. Entering the Equivalent circuit Editor you can select a circuit through Circuit-->Open Circuit.
you can use electro-chemical circle fit option in NOVA data explorer view as a guidance and start fitting your data.
observe the fitting in fit and simulation window and make changes accordingly to your circuit elements. i hope it works. let me know if you need any help.