Import recorded animations by going into Sapien > File > Import Recorded Animations, or something like that. They'll appear in Hierarchy View > Mission > Game Data > Recorded Animations. To play one, use "recording_play" or "recording_play_and_hover" if you want the vehicle to hover afterwards.

To create a custom animation, either use a JMA if you want it to be dynamic, and be reusable (for HEV pod insertions), or for dropships insertions, which are normally static, use a JMW for a world relative animation.