Quick Macro Question

[truthintheelves]

I've looked all over, and I can't find this anywhere, so I was hoping you ladies could help.

Does anyone know of a mount macro that would summon a specific mount - one of the horses, for example - and say an emote upon casting, but that would also say a different emote upon dismount?

For example: [Summoning Warhorse] GaryStu summons his faithful Warhorse.
[Dismount/Dismiss] GaryStu dismounts.

I'm not that great when it comes to macros and tried making it on my own, but it always says both emotes upon casting, and neither upon dismount.

I ask because this new hunter is quite the horseman, and is almost constantly riding. :P

Thanks in advance, everyone!