This plugin allows you to override actions, views, and partial views in the admin.
Source is in src folder. Deployable plugin in plugin folder.
There is a demo view for Product Create/Edit (/Admin/Product/Create) in \Administration\Views\Product_CreateOrUpdate.cshtml. It can be deleted once you see how it works.
https://github.com/aztekweb/Nop.Plugin.Misc.AdminOverride
http://alexwolfthoughts.com/overriding-nopcommerce-admin-views-and-partial-views/ https://www.nopcommerce.com/boards/t/48800/use-plugin-partial-view.aspx