Be aware mortals!
Here you have now Mammoth Tank sounds from C&C3. I renamed them properly (1,2,3,4,5,6 select, 7,8,9,10,11,12 move, 13,14,15,16,17,1, then converted into valid .wav so RA2/YR can use it.
All what you have to do are following 2 things:
1. put files inside .bag file or copy paste them into RA2 folder if you are using Ares
2. Open Soundmd.ini then:
In [SoundList] paste this

1036=MammothSelect
1037=MammothMove
1038=MammothAttackCommand

And somewhere down paste this


[MammothSelect]
Sounds=mamm1 mamm2 mamm3 mamm4 mamm5 mamm6
Control=random
Volume=85

[MammothMove]
Sounds=mamm7 mamm8 mamm9 mamm10 mamm11 mamm12
Control=random
Volume=85

[MammothAttackCommand]
Sounds=mamm13 mamm14 mamm15 mamm16 mamm17 mamm18
Control=random
Volume=85


I did all job for you! Enjoy
~MasterHaosis