If the Dragoon fanstand is similar to the Pelican USB one, then ditch it totally. The Pelican one is awful, I don't know how the Dragoon compares, but it looks like about the same premise. Just adding the talismoon fan should provide enough additional cooling. Remember, there is no total fix for the heat probs, save something like the heatgun method. As far as the case, XCM cases ship with the T-10 driver necessary to remove the case and the XCM tool. The XCM tool is handy for dissembling the case.
This is the XCM tool:
The T-10 driver is pictured beside it. Things to watch out for are releasing the "hidden" tab on the HD side. The tabs that snap into place on the grills are fragile on the XCM case, much morseo than the ones on the stock case. Expect to take about an hour or so to remove the stock case initially. Aside from that, check my Xbox 360 Quicklinks guide for links to several dissembley guides.