some screenshots:
http://boxen.math.washington.edu/home/emil/doc/html/en/Windows_Installer.html
sources of the installer are in:
http://boxen.math.washington.edu/home/emil/Win-Inst/SageWinInstBuildDir/
Take care
emil
Download
http://boxen.math.washington.edu/home/emil/Win-Inst/Sage-Win-Installer.exe
merry christmas
emil