First, this belongs in the game-help section, floof. ^^
Anyways, do you mean download a preset from the internet or use on you already have? I'm not sure what you mean; please explain. ^^
-One from web~ Download the preset and save it to desktop. Export all of the presets parts to C: >>> Feralheart >> my_presets (PRESET NUMBER). Then go in-game to the preset maker and see if it works.
-Uploading your own preset~ Create an account at Mediafire.com and then go into C: >>> Feralheart > presets and get the preset you've just exported. Then upload it and then volia, you can share it.
If your PC will not let you download FH, first try another browser. If that doesn't work, check you Firewall. Your firewall may be blocking FH.