Hello,
you can do an upgrade from Vista which will save your settings and programs.
A clean install takes about 35 min. as Microsoft has removed the email program as well as other programs to streamline/optimize the OS.
They are recommending using their "Live" programs now.
However I /and Microsoft (at there pre release road show) recommend the best way is a clean install.
I suggest investing in a USB flash drive, the 4 gig ones are selling for as low as $10. these days here in Canada.
Use it to save and install programs from.
I save any downloads in there original downloaded fore.
To make them easier to find when I download them I save the to a folder with another folder with the name of the program as the file name.
When I downloaded the Windows 7 RC I saved it to
F (my USB drive)/Downloads/Win7.
I burn programs I want to keep long term to a CD as most computer have a CD player that will boot from the CD.
Windows 7 is great I have been using it since it's first BETA.
I like it so much I started a Yahoo win7 group
I'm running Windows7 Ultimate thanks to MS Traveling road show.
Mike the mod @ vista_ & Win7
http://ca.groups.yahoo.com/group/vista_/
http://ca.groups.yahoo.com/group/Win7/