Other Issues - Migrate from MS Dynamics CRM 4.0 On-Premise to CRM 2011 On-premise

We have MS CRM 4.0 on-premise hosted on our server having database MS sql2005 now we want to Migrate it to the MS Dynamics CRM 2011 On-Prenise so would you please guide me to how to achieve this
 
What are the Prerequisite to migrate to CRM 2011?
How can I migrate all my customization like plugins and java scripts ?
How can I Migrate my custome entities?

Reference from-

http://community.dynamics.com/product/crm/f/117/p/54434/98149.aspx

This is a supported migration method so normally everything should go fine eventually.

However there are some small additional steps..

Details are provided by Microsoft here: technet.microsoft.com/.../gg554767.aspx

If you have x64 there are some more steps : technet.microsoft.com/.../gg554706.aspx

Hopefully that helps :-)

hi,

Useful link:

http://weblogs.asp.net/pabloperalta/archive/2010/11/01/step-by-step-installing-crm-2011-on-premise-and-migrating-from-dynamics-crm-4-0-32-bits-on-premise.aspx