Based on this post www.dotnetnuke.com/Community/Forums/t... I decided to write up the steps to add an additional ascx control to a module.

Project->Add New Item->Web User Control
Project->Add New Item->Resource File
Rename Resource1.resx to WebUserControl2.ascx.resxOpen WebUserControl2.ascx.cs
Change "public partial class WebUserControl2 : System.Web.UI.UserControl" to "public partial class WebUserControl2 : DotNetNuke.Entities.Modules.PortalModuleBase"
Open WebUserControl1.ascx.cs
Change "public partial class WebUserControl1 : DotNetNuke.Entities.Modules.PortalModuleBase" to "public partial class WebUserControl1 : DotNetNuke.Entities.Modules.PortalModuleBase, DotNetNuke.Entities.Modules.IActionable"
After the Page_Load function in WebUserControl1 add
  public ModuleActionCollection ModuleActions
  {
      get 
      {
          ModuleActionCollection actions = new ModuleActionCollection();
          actions.Add(GetNextActionID(), "WebUserControl2 Menu Text", ModuleActionType.AddContent, "", "", Globals.NavigateURL("MyControlKey", new[] { "mid/" + ModuleId }), false, DotNetNuke.Security.SecurityAccessLevel.Edit, true, false);
          return actions;
      }
  }
Open WebApplication1.dnn
Add the follow moduleControl block inside the moduleControls
  <controlKey>MyControlKey</controlKey>
  <controlSrc>DesktopModules/WebApplication1/WebUserControl2.ascx</controlSrc>
  <iconFile />
  <helpUrl />
  <supportsPartialRendering>True</supportsPartialRendering>
  <controlTitle />
  <controlType>Edit</controlType>
Add the following 'file' blocks to the 'files' block
  <file>
    <name>WebUserControl2.ascx</name>
    <sourceFileName>WebUserControl2.ascx</sourceFileName>
  </file>
  <file>
    <path>App_LocalResources</path>
    <name>WebUserControl2.ascx.resx</name>
    <sourceFileName>WebUserControl2.ascx.resx</sourceFileName>
  </file>
Include WebUserControl2.ascx and WebUserControl2.ascx.resx in the zip file.

I haven't gone through and tested these steps additional steps, so there may be a glitch or 12, but it should lead you in the correct direction for adding additional functionality to a module. Let me know about any issues and I can update. :)

 You should start a new thread with your question as it doesn't pertain to this topic.