In comes the freeware ap Caffeine:
"Caffeine is a tiny program that puts an icon in the right side of your menu bar. Click it to prevent your Mac from automatically going to sleep, dimming the screen or starting screen savers. Click it again to go back. Hold down the Command key while clicking to show the menu."


Very cool ap so far, and now I don't have to use a custom battery setting to keep my mac awake. I love less work!
Caffeine can be downloaded here.