Problem in custom painting_dyn

[DRedshot]

You need to change the name while it's open in blender, you cannot change it in the model editor.
I'm not too familiar with blender, but you should be able to click on the frame/paint and a text box should appear somewhere, saying something along the lines of 'Object Name' or 'Mesh Name' or something. This is where you enter it's name.

Although, if you just want the file renaming, you can of coure just click 'SaveAs' and save it as whatever name you want.

As for the first part not working I'm not sure :/
Ok, maybe you accdentally clicked the body instead of the mesh. Click on the Body, then go to the 'Attachments' tab again, 'Su' and attach again. This time though, click on the Frame and the paint. Making sure the mesh highlights when you click (and trying not to accidentally select the body!).
When you click 'done' there should be two green lines linking the body to the mesh (You might have to move the body areound before you can see it properly).