Unfortunately that’s something that will take quite a bit of time and Custom Code, which would kind of go beyond the scope of support.
If I find some tutorials on how to do it then I’ll send you a link.
Edit: Found one…..although I’m not sure if that will work with your version of Epik or not since the post was created in 2013.
http://jennifergrayeb.com/2013/09/freeze-header-on-genesis-epik-theme/