Back in 2006 this request was raised in a thread named "ST Check In - How specify active item (CR)?" at this URL
https://www.finalbuilder.com/Default.aspx?tabid=53&forumid=1&tpage=1&view=topic&postid=1679#1679
How is this comming along?
I would like to add that in addition the use a CR as the process item it would be good to be able to use Tasks and Requirements as well.
Lars