Whups, sorry ... my bad Casey
. FSDS is the acronym for Flight Sim Design Studio now in version 3.5.1. Don't let the name fool you, the only reason they really call it that is that it supports natively all of the 'built-in' animations in MS Flight Simulator. It's a full featured object design program that supports key frame animation, reflective and transparent textures, multiple LOD models etc. etc. etc. It exports in standard .mdl object format.