How do I add a "clean" image of equipment?
Depending on your browser, you can either install an ad blocker and then do a search for a possible file i.e medallion would list something similar to http://dawnofthedragons.cdngc.net/lots_live/images/items/equip/atreyus_medallion.png , you could then save and upload this file, or if you are using chrome you can enter chrome://cache/ and then search for a name from the results, some files do not come in an optimized size and would need to be edited to a max 128x128px, at some time i'll write up a guide for this, but this should point you in the right direction. or send me a link to the page and i can locate most images for upload.
The other problem is that some files don't come in png format. http://www.picresize.com/ Is a pretty good tool for translating to png and resizing / cropping in one operation and you can use their Web feature and enter the url http://dawnofthedragons.cdngc.net/lots_live/images/items/equip/atreyus_medallion.png without needing to save the image out of the cache and then re-upload.