If you are using SharePoint Designer to edit your pages layout, you should probably know that you can customize the DispForm.aspx, NewForm.aspx and the EditForm.aspx easly. You are able to insert text, modify the page layout and insert SharePoint 2007 Web Parts. But what happens if you don't have installed SharePoint Designer? You are missing the Site Action button and the Modify Page link button.... To avoid this problem add this querystring parameter in your form url:

ToolPaneView=2  

A example to this solution is and url builded in this way:
http://YourSite/Lists/YourList/NewForm.aspx?ToolPaneView=2

Now you cand edit your page by adding any Web Part that is installed in your Site Collection.