The .fhp files are only for players to view that person's preset that they are currently wearing. You can't wear it yourself though.
Anyway, you can use presets made by other members only if someone upload it for public and you download it.
How do you use a preset made by other members?
If someone uploaded a preset, for public and you download 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.
As Nommy Shark (http://www.feral-heart.com/smf/index.php?action=profile;u=263796) said:
As stated above, .fhp file presets are exported by the creator to allow other members of the community to download and view that preset in-game only. If you'd like to wear a preset, then you will have to make one yourself with your own creative skills, floof.