None of these replies get to the bottom of what the min. requirements for Tree Druid are, and I can't see the details on their website. If I were you, I'd demand a refund on the grounds that they mis-sold it to you (if they really don't put min. requirements on the site), and plough the money into getting C5 Pro. BUT if budgets are tight and Zenstar will confirm that it works with C2, then it might be worth you knowing that C2 is being given away on the coverdisk of the current 3D World - Issue 77 (May 2006), UK RRP 6.00 (Obviously don't know if it's sold in Australia, but you may be able to source it somehow... (There's also a discounted upgrade offer in the mag).