The Document Set home page is sort of a unique beastie. Here's an article to get you started on editing it:
http://office.microsoft.com/en-us/sharepoint-server-help/customize-the-welcome-page-for-a-document-set-HA101782474.aspx
You can add Web Parts like a Content Editor Web Part (CEWP) to link in your code or edit the page directly in SharePoint Designer.
M.
http://office.microsoft.com/en-us/sharepoint-server-help/customize-the-welcome-page-for-a-document-set-HA101782474.aspx
You can add Web Parts like a Content Editor Web Part (CEWP) to link in your code or edit the page directly in SharePoint Designer.
M.