As far as I know this hasn't been posted yet but if it has sorry :P
Make a macro and put:
.Mount 21425
.Cheat Fly
.Mod Speed 20
.Cheat Flyspeed 30
This is for the Swift Nether Drake mount if you want to use other ones just .npc spawn the mount then .npc info it and find the display ID and replace '21425' with the new display ID.
To dismount make another macro doing the opposite
.Dismount
.Cheat Land
.Mod speed 8
.Cheat Flyspeed
Enjoy!![]()