Need Help! how do you get G code back into BC

I made a solid mold cavity part in BC V25 and generated the code to rough it out. Now I want to do a finish pass on it. How do I get the old code back in BC so all I have to change is the step over and feed to generate a finish pass??? Problem I'm having is I can't remember what all the parameters were on the roughing code so when I try a few days later to do the finish code it's not doing what I want at all. So is there a way to just open the code that worked for roughing in BC, then edit it ? Thanks, Rj noob