preset

Hey folks. I've been working on creating a way to process my digital photos to emulate (as accurately as possible) the look of Kodachrome 64 film. So far I haven't come across any presets online that resemble Kodachrome much at all (even though they claim to) so I set out to pull it off myself...

I wanted to create a preset in Adobe Lightroom 5 for someone with Adobe Lightroom 4. Would the preset work pretty close to the same? Or would I need to do something to the preset file to make it compatible with Lightroom 4? Is it possible to change preset compatibility in Lightroom? Thank you...

So I threw a preset on a photo but there's a girl in it that I want to keep without the preset...I want her to look the same as she did before I threw in the preset. Is there a brush preset for this or a way to achieve this without photoshop? I really need help with this. Thanks.