So....does this mean the only way us XP users will be able purchase any new premium skins will have to use/purchase MyColors in order to get them?
MyColors is how hey are packaged. It's like a ThemeManager, but has the basic software with it. You pay for the theme, and OD users get a discount because they already paid for the full versions of the software.
Once you install MyColors, you don't have to reinstall it, you just use it to download and apply the themes. It also has an update feature, so if we fix a glitch in a theme or add to it, you will be able to use MyColors to update it.