Changing transparency through hex?

[Grymskvll]

I've started a custom mount project and one of the main features is that the mount is transparent. I've looked through the guide for changing size and transparency but it the alpha just stayed at 100%. After thinking about this I concluded that the mount alpha is set by the character that rides the mount, not the mount model itself (the reason I think this is because when you see a mounted priest in shadow form, the mount is transparent and has the colour change aswell).

I don't want to change my the riders alpha so I put some research into ways of changing transparency other than through DBC and found this on wowdev:

Transparency

Specifies global transparency values (in addition to the values given in the Color block - I assume these are multiplied together eventually?)

nTransparency records of 0x1C bytes starting at ofsTransparency, followed by data referenced in these records.
Offset - Type - Description
0x00 - AnimationBlock (short) - Data for transparency values

Transparency: 32767 for fully opaque, 0 for fully transparent

I'm a complete noob when it comes to hex editing so I'm asking you guys: what exactly do I change and what do I change it to if I want to put the alpha of a normal .m2 at, for example, 50%?