Let the 30 day opt out NIS 2010 trial expire and install purchased CD version -- any issues?

 

I'd like to let the opt out 30 day trial of NIS 2010 expire and install purchased CD version -- any issues?  Have people done this yet?  

Is this pretty easy or is it too much hassle that I should just let me trial version convert to a pyaing version.

 

The reason I want to buythe CD is because it's $25 cheaper and I can install it on 3 PCs (not sure I can do that with the trial version?)

 

Thanks in advance for any input.

 

-Ed