Hmm...a lack of instructions could be a problem! Again, I've never seen the Jaguar set, and I don't know which T-34/85 you're building.
By moveable, do you mean fully operational (like for RC), or just positionable, like to conform to the ground in a diorama?
If you just want to position them, for the Dragon kits (and others with seperate suspension arms) it should be simple enough to just do whatever modifications are necessary on your kit to position the arms where you want them.
The Tamiya T-34s all have the suspensions arms molded on, I believe. In that case, you'd have to cut them off and replace them with something (or rework the arms you cut off), like the Jaguar set you have.
Hope some of this helps!