Refering v3.5 of System.Web.Extension and System.Web.Extension.Design on a .net 2.0 wesite.

Hi

I have a we site build on frame work 2.0 running on server 2003. Now i have to migrate it to 2008 server. The website has reference to v1.0.61025.0  of System.Web.Extension and System.Web.Extension.Design. To make them work with 2008 server ( with no 1.0 dlls in GAC) i have put the dlls in bin folder. But i have been adviced to refer the v3.5 of the the dlls in 2.0 project.

This gave me lot of amiguous reference erros and many design errors. Is there any way to safly over ride this errors with out affecting other componets like Ajax.

Thanks in Advace

Nithin

Nithin