[SOLVED] Combining different meshes?

[FailedExperiment]

I've recently downloaded some .obj files which I have exported to collada format (.dae), and I have all the UVs laid out with the specific images I need wrapped around each item. A problem I have is that I have exported several different meshes to create the same object, such as the body of the character, specific eyes, teeth, etc... for extra manipulation, but I don't know how to combine each mesh into one model. I imported each mesh into the model editor, but once I try to import a second one to connect the meshes, it opens the new mesh. I am having no trouble whatsoever with specific UV layouts or textures, but how do I combine two or more meshes together to form only one (.ent) file?