[Rigorous]

well then my apologies for giving you the best advice i had. i was only making suggestions based on what i consider to be fairly extensive experience with a great number of excellent as well as somewhat poor mods and a good deal of reading in an effort to help.

i recognize what i said was beyond the scope of your original question and was an uncalled for recommendation about interface elements and memory usage.

hence....

unfortunately, i too am unaware of any Catalyst-like mods because that functionality was built into Blizzard's client some time ago. again, my apologies.

EDIT: my point was merely to address your perceived problem: zone load times. in the absence of a Catalyst-type mod (as the specific functionality of Catalyst is no longer necessary), your only option (to my knowledge) to decrease your load times is to optimize your interface setup as much as possible. i was merely making suggestions, based on my experience, to that end.