bits' useful link

msdn:

http://msdn2.microsoft.com/en-us/library/bb968799(VS.85).aspx

Advanced Installer 6.2:

http://www.advancedinstaller.com/index.html

Software Update Wizard:

http://www.powerprogrammer.co.uk/

catenalogic' updater:

http://www.catenalogic.com/http://www.catenalogic.com/