Yes, we are digressing. But it's a fun topic!

Sailcut is OK. It has its shortcomings and errors, but it's getting better. You should use Sailcut CAD, the open source version, if you have used the older versions. http://www.sailcut.com/Main_Page
I have not had Sailcut CAD crash while using it. Professional design packages are expensive, but you can download a trial version of SmSw6, which is in use by Quantum and Neil Pryde. You'll not be able to save anything tough, and it's a large and complicated package.. http://autometrix.net/services/downloads-software-smsw6.htm

To make a quality copy of a sail you would have to pick it apart and copy the panels. Only this way will you know how it was designed and what the design shape was like. The next best thing is downloading Accumeasure from the UK-Halsey website and use it to determine the vitals of the sail. Spread the sail flat and determine luff curve vs. broadseaming etc. You can then guess what the design shape was like and try recreating it.
Picking a sail apart and copying the panels feels a bit like stealing if you are selling the end result. But I suppose for a private citizen doing so for his own use it is not punishable by IP laws. At least I think it is so here in Norway. I dont think the sailmaker who buildt the sail originally would be happy. You would have to do this while the sail was new, before the cloth stretched and seams settled. New sails have always been dear to me, so I have never had the heart to do so.
Just measuring draft amount and position at the battens is not enough if you want to do a "copy". Luff curve and twist designed into the sail is vital for performance, just as important as draft position and amount. E.g. we did a recut of the upper 1500mm of our mainsails luff curve some time ago now becouse the top was too flat. We started by removing 0mm 1500mm down and 12mm at the head (along a fair curve blending into the existing luff curve further down). This small change was enough to completely alter the top section of our mainsail resulting in more draft in the top section and a leech twisting off at the right moment. I would say making luff curve match mast bend properties is even more important than draft amount and position, but it all have to be perfect to be a great sail.