Please accept my aplologies for the delayed response.
In answer to your questions.
1) You have two options here.
You are able to select items in the design by attribute or property. If you set this to Harness and make the value equal to the harness you want to check all the associated items will be highlighted on the design.
You can write a custom report to provide all objects in the design with a particular harness attribute, if you are interested in this please read the following community document http://communities.mentor.com/docs/DOC-2012
2) Composite breakdown is not supported in VeSys 2.0, I would suggest that if you are doing a lot of work in this area you should start investigating Capital HarnessXC
ok, thank you for your perfect reply.