Windows Vista Couple of questions re: Vista.

Installing Vista, I was told some of my programs will not work. Those programs are:

The Sims 2
System Mechanic 6
Microsoft Powertoys for XP
Works 8
PowerDVD 6
QuickTime 6
Norton Security Center
Sun Java Scheduler
DesktopX
nView Desktop Manager

Question 1: If I were to run these programs once Vista was installed (it's not requiring me to uninstall them), could I run them in a compatiblity mode, like what XP has?

Question 2: Three programs it asked me to remove before it would even continue installing are Norton Applications 2003-2006 and Nero Burning Rom (I use it for my backups). Would I be able to reinstall these after Vista is finished?

Question 3: Does anyone know where I can find an unofficial driver to force Vista to support my printer? It is a Lexmark P915 and their website doesn't have a Vista driver, or any beta drivers.