Download the Last one, Pre-Compiled package for Floppy (DOS - Win)
You will have a Zip file, what I did was create a folder somewhere, desktop works, called memtest, unzip all the files to it(shold be 4 i think), then put a floppy in the floppy drive, then in the folder you made it makes a folder called floppy, open it, you will see the 4 files, double click the one named 'install', it will bring up a DOS looking window which asks you to type the letter of your floppy drive, which is most likely A, so type a and hit enter, then it says put a formated floppy in, do so if you havnt already and then hit enter, then you hear the floppy drive goin for a few seconds while it copies the stuff, then it tells you to start from the floppy disk reboot your computer and press any key to exit or somethin, which takes you back to windows.
So if you do all that and have your BIOS set to boot from floppy first, it should work fine.
Heres a quote from their README on how to install:
For Windows, unzip the package into a directory like C:\memtest, insert a blank floppy into your a: disk drive and run the install.bat file. As the install prompts you, to use memtest directly, leave the disk in the drive and reboot your machine.
How were you setting up the floppy disk before? Were you doing it like how I and the Readme says? Or were you just trying to unzip the file to a floppy and boot from that?