preselected default operating system at shutdown

Hi there, currently I am running Windows Media Center, and XP home on my computer. They are both on their own hard drives, and I did it using the standard windows way, xp home install, then media center. At the select operating system page, i set the countdown to 10, and it will auto pick Media Center. Is there a way I can tell the computer which operating system i want set to default without having to edit the boot.ini file everytime from "msconfig". Is there a program that lets me switch operating systems without having to go through a complete shutdown? Anything to make this process quicker and easier?

Thank you.