If you copy a feature you need to clone it correctly so that it is no longer using anything from the original feature. I do not provide support for your cloned feature, so it is important that you fully understand the code that you copy, since it is up to you to fix any problems with your forked code. You should not copy and modify any code if you don't understand the code.

The one tip I will give you is that the featureGuid is used as part of enforcing security, so in your copy of the edit page you need to make it use your new featureGuid for the security check instead of the HtmlContent.FeatureGuid.

Hope that helps,

Joe