Windows 7 Batch file help for IE 8 new session

The bank I work for is running IE 8 for security reasons and our users have 1 login to our lending software. I have managed to put together a simple batch file to launch our most used programs to start the day. The problem with 1 login is users have to use "new sessions" with IE 8 to allow multiple instances of our lending software. I want to be able to automate the selection of "new session" with the batch so that step is eliminated for staff.

Note I cannot make registry changes to make this happen.

My batch is set up like this:
@echo off
start "IE" ""C:\Program Files\Citrix\Internet Explorer"
new sessions code here???
start "next program" ""C:\Program Files\next program"
start "next program" ""C:\Program Files\next program"
start "next program" ""C:\Program Files\next program"
start "next program" ""C:\Program Files\next program"
and so on.