Originally Posted by Devo7v
Yes, you can absolutely do that. Please watch this video
to learn about the basics including backing up and restoring ROM slots. It's for a different phone, but it works exactly the same on the S4 Active.
Thank you. That makes me less worried about trying different mods.
Edit: I made a new rom slot, restored the backup to it, and installed xposed. Thank you for your answer. On my second GS4A, did not want to come close to having to restore this one after my last mishap.