I find GoalEnforcer much easier to use, as it is specially cut for planning and project management. I didn't have to read any boring documentation, just followed the interactive tutorial and I felt like I knew the tool for years, it felt so natural. You should give it a try http://www.goalenforcer.com/ No software is "pro" at drawing like my hand, I'm a painter :-) , but I really think that the greatest benefit is that "it makes it easy to correct mistakes."
I think it would be easier if you think in terms of breaking your goals into sub-goals before assigning a timeline. Take a look at GoalEnforcer http://www.goalenforcer.com They show you how this process can be done visually.
