Check this thread out it will help you alot with maxim
http://www.iceinspace.com.au/forum/s...d.php?t=111969 Ricks comment is fair though maxim is pretty great to, CCDStack has alot more option though its not for the beginner and lol if it wasn't for the video tut Making every pixel count i wouldn't touch it. I use mean for lights and clip the darks for a median. Really CCDstack rocks best with data rejection and i think maxim has better alignment options from my limit experience.