Reversing post page order /Please help soon if possible, due in 20 hours!

[designsbymkp]

Thank you for viewing my post! I have a very important client, and he just called me and asked me to change his News page (a post category as a menu page) so that the oldest post shows up first, new posts last. I have looked up a lot of stuff, but one made every page the news page, and one just made the home page the news page, no matter what I do. Is there some good way to do this?
I did this (safe link) and it worked, but made my front page the news page instead of the static page I created and had selected. Is there someway to do this better, or get it working, or at least get it baxk to at least going to my static home page while leaving the rest work?
Only problem is, this is for the freemasons, and my client needs to show it off tomorrow at 5pm Eastern Time..
Any help is appreciated soooooo much! Here is the website right now with the function from the first tutorial in my functions.php
Thanks!!!