When your friend uploaded a preset, for you and you downloaded it. There should be one/many file(s) in it.
Now if there is only one file inside with the name YOURUSERNAME_NUMBER.fhp then you have to put it in Local Disk (C:) -> FeralHeart -> Presets.
Then you go to character creator and the preset should be there.
But, if there are many files inside you need to place them in Local Disk (C:) -> FeralHeart -> My_presets -> preset_NUMBER.
Open FH and go to tools -> preset maker, choose the preset you downloaded and export it. Now log in and you should be able to use it.
Hope this helps....if this didn't work then I try to find more answers