RIM has posted a way to send PIN's programmatically... but be aware that you can't test it in the emulator and it uses secure APIs so you need a license to compile and run it on the BB.
Example can be found here:
http://www.blackberry.com/knowledgec...ogrammatically
Hmmm... it seems no forum system likes to actually let you link to that.. so copy & paste the following into your addressbar (make sure the entire URL shows up):
www.blackberry.com/knowledgecenterpublic/livelink.exe/How_To_-_Send_a_PIN_message_programmatically.html?func=doc .Fetch&nodeId=817115&docTitle=How+To+%2D+Send+a+PI N+message+programmatically