I need to purchase Photoshop CS4 and Lightroom 3. On Adobe's site I only see an upgrade download for CS4, everything else is CS5. Also, there are sooo many sites that (claim to) sell these programs new, some are student/teacher edition. I do have a child in High School, and I am a Boy Scout merit badge counselor (for photography badge). Does any of this qualify me for a student/teacher edition. Where is the best and cheapest reputable place to buy these two programs?? Thanks for your help.