Changing Node Name, Cluster Name and SQL Virtual Network Name

I plan to rename 2 Cluster Node names (2-Node Active/Passive Cluster in SQL Server 2008 and SQL Server 2008), Cluster Name and SQL Server Virtual Network Name.

I see few articles here and there with pieces of information, but is it possible to have actual steps and pre-req on how to do it

1. Will I need New IP Address for new names or I can MAP 2 names to 1 IP Address?

2. What should be the chronological order to complete this name change process?

3. Since the SQL Is already installed, will this in anyway affect its functionality?

Thanks in advance!!