Here's what you need to install FlyMod and other 1.8 mods on your machine.
Upgrade to 1.0. Just log in and tell it you want to upgrade. Easy enough.
Quite minecraft
Go to %appdata% (Windows start menu, run..., %appdata%)
Go into the minecraft folder there.
Drop this file in the "bin" folder. It will replace a file there called minecraft (or minecraft.jar).
Create a folder named %appdata%/mods/zombe
Unzip this file and look inside for a folder called "config"
Move THE CONTENTS of that folder into %appdata%/mods/zombe/
Restart minecraft and you should be good to go.
If you want more information on Zombe mods, you can look here.