(3rd Part):
If you want to do a 'clean' install, start as above. (i.e. select 'First Floppy Drive' followed by 'Boot with CD support'. At the flashing cursor, type format C: You'll be warned that you're about to lose all your data and asked to confirm. Type y (for 'yes') and hit enter. Your PC will now format the hard drive.
When this is completed, type E:setup and continue as above. (It's possible that you might have to restart your PC before doing this. If so, you're now at a point where the above instructions, for overlaying Windows, will work for a clean installation).
A clean installation of Windows deletes all of your driver files, including your video drivers. When Windows first loads, after a clean installation, it will be in low resolution (640 x 480 display). You should then run the set-up programs which, hopefully, were provided with your PC. (If you haven't got a set-up CD you might have to download the appropriate driver file before you can change the screen resolution. (Note that this only applies to a clean installation. You won't have this problem if you only overlay Windows).
Hoping this helps,
Chris