csla upgrade questions

We had an asp.net web application developed in csla (3) with visual studio 2008, aps.net 3.5 C#

Now we want to upgrade it to aps.net 4 or 4.5 with vs2010 or later.

Questions:

1.       Can current csla (3) be able to update directly with vs2010 or later without any changing?

2.       If we want to upgrade to csla 4 or later with vs2010, what needs to be changed? Any instructions?

Thanks

John