Moving wordpress from .com to .net

Hi all

I have my wordpress installation running on my .com domain in the root directory. It’s installed in ./forum but loads from the .com root when a browser navigates to the URL. I just obtained my corresponding .net domain which is hosted as a subdirectory of the .com I currently have joomla! installed in the .net subdirectory.

My question is this: wordpress is installed in it’s own directory, but loads from the .com . I want to move its loading root to the .net . I am using permalinks, and I wish to preserve the links for search engine result purposes. can I do this? I would like to swap the joomla! installation into .com and wordpress into .net

Thanks