Default Manually remap vol up/down key?

I had an xposed module that would remap the keys for me, but I went to a new rom and that xposed module no longer works.

How would I manually remap the app launched with a long press of the volume up or down keys?

Sent from my Sprint LG G2 (LS980) using Tapatalk.
Current Device:
Phone: Sprint LG G2 LS980
Rom: CloudyFlex
Kernel: Dorimanx
Method: ioRoot v25
Recovery: TeamWin | AutoRec
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Previous devices:
Htc Evo 4G - GB - MikG - Underworld Sense - RA-smelkusMOD
Htc Evo 3D - JB - MiUi v5 - MiRaGe JB - 4Ext Revoery - S-Off JuopunutBear