Glad your associations are working again, at least. KMP is a biy cryptic at first, but you can do all kinds of wonderful things with it. Dig around in the prefs when you have time - you can screengrab entire clips, or convert them inside KMP for use in other apps, or all kinds of fun stuff. Also, the hardware overlays are sweet.
XnView is just a replacer for SuperJPG or say IrfanView, which is a stupid name for a program. XnView handles all file types internally, and batch conversions, runs Photoshop filters etc., but most important to me is the shell extensions for right-click batch processing. Say you’re in Yahoo Mail or something and trying to send an attachment, only your rendering was an .iff or .exr file? Right-click “Convert to…” and you’re set. Or you can select multiple files and do this, super-quick. And a billion other things that I use daily. The only real reason I brought it up here is that it resets and “takes over” all your image file associations (that you tell it to, of course) and lets you take back control from association-hungry apps like Quicktime, DivX, Photoshop, etc.
Just some ideas. Hope KMP helps, and if you don’t use XnView, no big deal! It’s your world!