When did I say that it's impossible?
Serverside emulation of these flying mounts is a easy thing.
Creating a 4th Char with old server files + old client files is nearly impossible if you don't have the real source code.
Cracking the limit on Asm level and extended it is also nearly impossible and you'd spend many hours, for well...nothing. It's easier to emulate the new client with the old server files.
The mount pets are already in the Client...New Client..
So it's easier to use it this way.

