Update NIS2010 to NIS2011

Hi,

 

First, instead of Update Me Now can I download 2011 and update locally from an exe? I have 4 active NIS2010 licences and I don't want to download and Update Me Now the same thing 4 times if I can avoid it.

 

Second, are there any gotchas or is it quite simple to do?

 

Thanks,
Rowantree