The standard way to create a Windows boot disk is to have access to a Windows system. If you have access to a Linux system instead, and know a couple tricks, you can create boot disk as well.
The first thing to do is find a website that has the boot disks available for download. There are plenty of these out there so take your pick. The only thing you must specifically do is make sure that you download the disk image and not a self extracting executable file which must be run under Windows.
If the image is zipped unzip it.
$ unzip cdboot1.zip
Archive: cdboot1.zip inflating: CDBOOT1.IMG
Check that the disk image is the correct size.
$ ls -lh CDBOOT1.IMG
-r--r--r-- 1 ryan ryan 1.5M 1999-12-07 12:00 CDBOOT1.IMG
Finally, you will use the dd command to copy the disk image to a blank floppy disk.
$ dd if=CDBOOT1.IMG of=/dev/fd0