How about some source code of what you've tried? What exactly do you mean by an "embedded image?"
Embedded as a resource in the project? If so, are you sure you've got the resource name correct when you load it? I use the following code to find the names of resources embedded in an assembly:
Assembly a = Assembly.GetExecutingAssembly();
string [] resNames = a.GetManifestResourceNames();
The resNames array will have all of the resources in it. The name may surprise you, as it will have the full namespace name, such as "StarTechnologies.SdtGui.VisioSupport.ImageList16.png" where the namespace name (in this case, "StarTechnologies.SdtGui.VisioSupport")
is, I believe, the Default Namespace property of the assembly's project.