Edgecam can certainly do the job. If these are all multi axis lathes, I would have someone write the posts. In the long run it will be faster and hopefully they will show you the proper way to use the post to get the right output. Bring you check book to this party, because it wont be cheap.
Who's your dealer?
Where are you located?
What training have you had so far?
Mike Mattera
Tips For Manufacturing Training CD's, DVD's for Mastercam, SolidWorks, Inventor, G-Code Training & More
http://www.tipsforcadcam.com