I have come up with several different methods for this and have tested them all on my local version:
1) stores the default zoom in your showeq.conf file (all zones)
2) stores the default zoom PER ZONE in the filters file for it
3) stores the default zoom PER ZONE as the first line in the map
All three have been tested by me and work -- just wondering which most ppl are interested in and I'll submit it to the showEQ team to use if they'd like.
Cheers