How can I successfully uninstall the new Mac Pages program and go back to the 09 version
The Mac App Store updates to iWork should not have replaced the original iWork '09 apps. Simply delete the new apps and use the old ones.

The original apps should still be available under /Applications/iWork '09 as well as if you search for them in Spotlight. If you've deleted the older versions, you can use Time Machine or reinstall them from the retail CD.