How do I use AJAX?

The Calender Extension looked cool, so I downloaded AJAX, the framework, named ASP.NET 2.0 AJAX Extensions 1.0 (why not just Ajax Extensions?). This installed without any problems. Then I downloaded ASP.NET AJAX Control Toolkit (what's wron with Ajax Toolkit?)...

I'm running Visual Web Developer 2005 Express Edition (I just LOVE long names). One video I saw (athttp://ajax.asp.net/default.aspx) said that I had to add a reference to the DLL:s to be able to Ajaxify my website if I didn't have the full version of Visual Studio. I think I did that correct (Website/Add Reference... and then find the folder holding some DLL:s, I took all the DLL:s I could find, to be on the safe side!).

Now everything should be done to get started. No, I had to change to full permision for intranet, since my code is stored on the network (in Microsoft .NET Framework 2.0 Configuration (I've now almost run out of keys on my keyboard...)/My Computer/Adjust Zone Security/Make changes to this computer and on the Local Intranet tab change the level to Full Trust).

I still get error messages, all starting with "unable to...". Does anyone know if there is a guide/tutorial for VWD 2005 Express Edition, from downloading whatever needs to be downloaded, to using it, to ajaxify (a word used in the video I referred to above) exisiting websites, putting files where they should be put and make necessary changes to existing projects?

Thanks!

Found a good start herehttp://www.asp.net/learn/videos/view.aspx?tabid=63&id=81. This video shows that the web.config file has to be modyfied, and how it could be done. It does, however, not explain the puropse of the new elements in the file, after all, it's only a video.

After doing these changes, I got a new error: "Element 'SciptManager' is not a known element...". I managed to fix this by doing nothing! I might have restarted the application, I don't remember. That doesn't make me satisfied, though. I keep getting errors that disapear by themselves after a while. I think I still need that follow-me-tutorial...