Hi Targutai,
I'm not sure what you really try to accomplish here, but if you want to use 'CMSPages' events, they are place in the 'CMS.UIControls' namespace:
CMS.UIControls.CMSPage.OnBeforePageInit += CMSPage_OnBeforePageInit;
But this will work only for CMS administration pages. If you want that info on public pages, maybe you should consider to use custom macro and place it on master page (depends what info you need).
Best regards,
Dragoljub