Converting Non Ajax enabled project - to an Ajax enabled - for Ajax toolkit

I have a new requirement which needs a calendar control as in the ajax toolkit.
But my application is in VS 2005 and is not an ajax enabled project.
How difficult is it to convert the project to an ajax enabled one?
If it is relatively easy to do it, will the conversion affect the behavior of the other pages within the project
which essentially dont use ajax functionality? 
Can someone please advise ? 

Hi,
Converting your web application to Ajax enabled is very simple. 
It won't affect the other pages in you application.
You can read about it in the following links:
How Do I:Add ASP.NET AJAX Features to an Existing Web Application?
How Do I:ASP.NET AJAX Enable an Existing Web Service?
I Hope it helps.
Gil Fink
MCPD Enterprise Applications Developer
http://blogs.microsoft.co.il/blogs/gilf

Perfect ! Thanks !!