to automatically start an application...
I believe the last post is not quite what you WANT to do if you are looking to start an APPLICATION automatically.
If you use KDE (Red Hat default is Gnome), simply copy the desktop icon to the ".kde/autostart" directory.
If you want to autostart in application in any X windows system (Gnome or KDE), I think all you have to do is add a line to your ".profile" script (in your home directory). In your case adding the line "evolution" should do it.
I hope this helps.