Rooting S4 with Odin without wiping user data topic

Help needed - I have accidentally deleted the entire gallery of my S4, and with S4 running KitKat 4.4.2 build XXUGNI1

I tried all the one click solutions to try to prevent any over writing of the storage but none of them, including tower root, seems to work on this build.

Is there any other way to try? I am thinking of changing to a custom Rom and load it via Odin - is there any way it can be done without overwriting user data?

Thanks in advance for any hints or pointers. Cheers.