Need some features into UML diagrams

[Александр Мартынов <amart mail ru>]

 I want to develop some tool for code generation based on UML, and I decide to use dia diagrams as source for 
this tool.
My tool will generate finite state machine code, and I use "UML - State", "UML - State Term", "UML - 
Transition" entities on Dia diagrams. It is not enough features in this entities. Such, I can't make the 
"inner" transition - when normal transition occurs, the entry/exit actions of states are executed, and 
transition action executed too. When inner transition occurs, only the "do action" of state executed, and 
inner transition action executed too. There is no primitive/entity for this pirpose.

 Next, I want to use the submachines - compound/complex states. There is no primitive/entity for this pirpose 
also.
 Now, my solution for that is to add some metainfo into UML object attributes, but it is not a good idea. Can 
anobody take more pretty solution?
 Next point is about object style/behavior. Object "State" (or another) has 8 connection points - 4 at 
corners and 4 at edges. It is not enough when making big statechart diagram, the in/out transitions makes 
unpretty non-understandable view.
 Next point is about custom properties. This feature in any (may be simple/primitive) form can help me with 
probles, descibed above, but there is no such feature.
 Next point is about UML, I think. I need to place some small portions of code or other custom staff into 
diagram for more complexity definition of state machine in one place. I use UML Note and UML dependency arrow 
to link note for states/transitions. Is there more pretty solution for this?

 Thank you for reading my message. Is there any plans to implement such features as above? I read roadmap 
trough 0.96 to 1.0 version, but not found anything like this.

 I use I think the last version of Dia - 0.96.1. Thank you for your work.