--how get number of target computer? Load on target PC and open PLU?
Do I load the 2007 program on the target computer and open PLU? After loading, will I be able to open the PLU?
Welcome to the community.
You can attempt this if you want. However, the PLU works aboout -1 times out of 10.
If your license is still valid (meaning it was never upgraded, cross-graded, or under expired Subscription) then you should be able to just install it on the new workstation and activate it over the Internet. If you need a manual activation you can do so. It's way better than messing with the PLU.
You can use the online method to activate your license here:
http://usa.autodesk.com/adsk/servlet/pc/item?id=18424632&siteID=123112
Good Luck!