Just a thought, invert the software!
why not partner with a Softphone company (plenty of them around) and get them to integrate a browser within their OEM softphone, (say softphone on the right, browser on the left) which opens up the FOP2 screen as per IP setup in setting. The browser can also draw the SIP account details form the SIp phone..
so it's one login to the windows based softphone which brings up the FOP2 panel and voila! you have one screen with all.
thoughts?