Alternative 3

The way I prepare some of my form documents is using Word's Mail Merge capacity. While designed to send the same form letter to multiple people at once, it works fine to fill in a form. You put your variable information into a data file (I use an Excel spreadsheet). Then you select one data set and print your contract using the preview function in mail merge. Or you could perform an actual merge to that one data record to get a final contract. I usually don't bother with the final merge.