How to change the boot sequence in Vista

Hello,

I have on my computer in addition to XP Pro or Vista to Vista to test something.
Now when booting the message: Previous boot operating system and anything Vista boot, but the selection is always automatically on Vista, and if you do not make 30 sec after Vista is booted.
This is what I would like to change and that the current default operating system (Win XP Pro) is booted and only if you choose Vista, Vista will reboot. But how? can someone help me?

http://forums.techarena.in/guides-tutorials/1066408.htm - Have a look on this guide.

Try VistaBoot Pro (its Free) here’s the link -
http://www.pro-networks.org/vistabootpro/

In the Welcome Center you click View Details on computer and then left click Advanced System Settings. In the next window you click on Settings under Startup and Recovery. Under System Startup, you can select the default operating system.

Greeting