wincc flexible 2007

hi, all
In winncc flexible 2007 is it possible to open runtime file from button ( my client have two different runtime files on one pc is it possible to close one runtime file from one button and open another runtime file from same button ?

I really cant understand the reason trying to have 2 different runtimes and I dont know it is possible or not but I dont think it will be possible...

Why not combine them into one runtime with a optional page to seperate them.I mean one page is the selector to different paths.
One leads to your first runtime pages and the other will lead to the second.