On ebay the are a couple of guys selling CNC training and simulator CD's/DVD's.
The first one listed has actual control panel simulators for many different machine, including the Haas VF series. I just bought one to see if it is any good. Only $13.20 with shipping, but may take awhile as it comes from the United Kingdom. If you want to wait I can let you know about it.
The second one is a g-code training DVD with a simulator too. You might contact them to make sure you can input your own code, but it does appear that you can. It is a 50 lesson training series. And you can watch many of the lessons right there on the auction page. It is $24.95 with free shipping. For the beginner this might be a great way to start.
Both have sold over 20 copies with all good feedback.
Happy learning.
Mike
GCode Programming Training - CNC Simulators + More!! - eBay (item 150553643165 end time Feb-23-11 10:16:53 PST)
G-CODE CNC MACHINING MILLING SIMULATOR TRAINING CAD CAM - eBay (item 320562099699 end time Mar-12-11 09:21:21 PST)
Two Haas VF-2's, Haas HA5C, Haas HRT-9, Hardinge CHNC 1, Bother HS-300 Wire EDM, BobCAD V23, BobCAD V28