For pages that are automatically generated *other* than the assets.aspx page, you can modify the tsysdbobjects database table to customize the views. See
this link. This is not officially supported however and will break your installation if incorrectly executed.
Assets.aspx is a "special" page that doesn't just read from an internal query and cannot be customized in the same way. Customization is on our wish list, but we can't give a release date for this feature unfortunately.