SQL SERVER 2008 Enterprise Edition Trial & full differenceses?
===

we need to buy sql server 2008 enterprise edition but
it will take 1 month .
I install to server trial version because we need now.
 but i have 2 question

1- Is there any limitations trial betwwen full version
2- When i have licence key .I Will use directly and what i need else ? 
can we use directly full version ? Anything we need to do ? 


Thank you so much.