Go to the page you want traffic to land on, go to properties, click "Page Paths and Location" and add the page path in the Additional Page URL(s) area.

I do this all over for the site I manage (http://www.smwc.edu/ ).

A few notes, the page URL is absolute and does not need file extensions. So in your example you would enter "/PageContent/Page" and it should redirect everything you have after that... (at least I think so).

In my case, I redirect things like "http://www.smwc.edu/academics/campus_program/admissions.php" by entering "/academics/campus_program/admissions"

The redirects work great.

Also, in my example above, the concrete redirect will not take over unless the page being redirected is deleted or renamed. I do this by just adding an underscore to the front of the original file "_admission.php"

Finally, this is a great way of getting people deep into your site with a simple web address. You can keep your site map organized in a heirarchy, but still give out URLS likehttp://www.smwc.edu/lrc - which redirects to the Canonical URL "http://www.smwc.edu/resources/learning-resource-center/". Great for publications and the such.

Hope this helps.

If you need to redirect pages that use URL variables to specific pages.
For example if your "/PageContent/Page.aspx?PG=1000" was your contact us page and you want to redirect it to your contact us page, you might have to actually add it to your .htaccess file.

I'm not entirely certain, maybe someone can fill us in on Concrete's ability to work with URL variables?