Can Vista automatically change between power schemes?

Hi,

I've been searching the web quite extensively for info on the possibility of
Vista self sensing whether its running on AC or battery!

Since the vendor of my laptop (toshiba) haven't come up with a Vista version
of their Power Saver program i really need to know if one could set-up Vista
manually to do the switch (it is rather annoying that i have to change the
power schemes by myself every time im on the move)..

If this feature isnt part of Vista, is there anyone who knows a program that
does the trick?

Thanks in advance,

Soren