*blush*
Spaz,
I am not aware of any issue when copying pictures and decorations on the diagram. For the application builder, VIs diagrams are removed so any picture within vanishes in the virtual void.
The sequence works too but it is very thick. You must state that the structure is solely for comment purposes because it is usually used for coding. Otherwise, sequences have no performance issues: they force execution order on the compiler but the code execute at the same speed.