I often use this method to reset Windows passwords to avoid using expensive proprietary tools. The tool is called chntpw and its source is available here. Most Linux security distributions will have this tool installed by default. If you do not have the tool almost every package management system will have it available.
You can resell iTunes App Store items using the LinkShare service. I haven’t had much luck generating links to iPhone applications using any third party applications or using LinkShare’s link building interface either so I imagine others are having issues as well. Below I will explain the links themselves and explain how to build iTunes App Store LinkShare URL’s manually. If you have the base link then you can manually switch out your LinkShare reseller ID and the iTunes App Store product ID to build the links yourself. There are a bunch of other variables built in so I will try to explain what they mean and if they need to be changed.