Hi Nick,
You can style the form with css but I'm doubtful about being able to get 2 questions on 1 line. There is really not a good way to inject extra markup between the questions. Editing the .ascx files would not be advisable and I don't think it would make it possible to achieve the effect you are looking for.
I realize these are not the answers you were hoping for but its much better to give you realistic expectations rather than have you be dissappointed if you bought it and were not able to get the results you were hoping for.
I am planning some enhancements for the Form Wizard in the future and will keep in mind your feedback and questions as well as others.
Best,
Joe