Tried something like this:
HttpApplication app = s as HttpApplication; //s is sender of the OnBeginRequest event
System.Web.UI.Page p = (System.Web.UI.Page)a
It seems like the HttpFilter solution is doing the trick here :o)
If I had used MOSS/.net 2.x+ I could have used Runes version or just added my tags in a master page...
Super suggestions and after my test of the solution, I'll accept miies.myopenid.com's solution as it seems to solve thar actual issue