Running modx from a different folder on a server...

Can I install modx in a subfolder from the root and have it displayed on the root? Example:
have their be a folder in the root called modx (so the url would be www.xxxxxxx.com/modx) but have it displayed at www.xxxxxx.com?

I know wordpress and joomla have this capability, does modx?

Yes. In your .htaccess file, just add the subdirectory name to the RewriteBase rule:

Awesome thanks, I moved the modx set up from a windows local server to a linux production server and now I can not login to the manager section, any ideas? Also getting a parsing error on every page. Need to get this resolved ASAP

Definitely see this topic: http://modxcms.com/forums/index.php/topic,37902.msg229607.html

There may be some configurations you have to change. There should be some information about what to change in that topic. Let us know if you get stuck.