I just got the game! W00t!
I take it you got President Forever + Primaries. You can actually download 1992 and 2000 scenarios to add upon the default 2008 one. Not to mention a 1976 and a 1968 one. Hope you enjoy. 
Where? It says there are no scenarios for PF+P other than 2004 and 2000.
Try the forum on there site. 2000 and 1992 were made, and they have a 1988 and 1976 fan made scenarios. I can't post on the forum for some reason, so I have to wait for someone to upload them to the site, but all of them are available for public download.
