AJAX :: Setup Vs2005 With 3.5 Framework For Better Performance?

my application is in vs2005 (2.0 framwork) , now i wnt to add ajaxcontrol on my applicaiton its ok and also working fine , now the problem is when i m using an ajax control its generate script so because of that page loading takes time ,

i also search the way to optiomize that , and i found need to[Code]....

i have also search the metod on how to combile that and all , some ppl using various way to combile that
one of that i found this article , + if you use 3.5 then can also

[Code]....

ut my framework is 2.0 and most of them functioning is avialble on (3.5 famework )

so wht is good idea shall i remove my 2.0 framework and again install 3.5 , will it affect my current application

i m only using (ajaxcontrol) feaures nothing else

coz i have seen if i use 3.5 i can use LINQ also and this <compositescript> too