Hi clowers,
1. The standard trial license is 60 days. So make sure you get the licenses before then. there is a bit of a backlog at Symantec, but it appears that it will get sorted out in the next week or 2.
2. MOST of the licenses can be installed, but not all of them. If you run through the licensing of the product (Tools --> find the licensing wizard!), it will state that there are some licenses that need to be entered. But on the whole, you can generally get away with trials on most of them.
Laters!