The UVs on the manes are rather strange, so be aware that it will still be hard to get anything defined on one area without somehow affecting another.Examples
Check here: Preset Tips and Scripts (https://feral-heart.com/smf/index.php?topic=61962.0), under the High Definition UVs section.
I'm assuming that you're making a standard sized preset, so your best bet is to download the Feline 1K (http://download1491.mediafire.com/nh54yl4b368g/0w7ttnt6s9iibnj/Feline+1K.zip) files and scale the UVs down to fit the image size of your mane texture.
I'll quote the examples from the OP in case you just want a quick reference.The UVs on the manes are rather strange, so be aware that it will still be hard to get anything defined on one area without somehow affecting another.Examples