You're not going to be able to "pin" things with this method, its just not doable in perspective. If you insist on doing it like Diablo2 did you will have to render out each possibility separately.
On the other hand, if you were to wait, there is the possibility that you could do it like Diablo3, and just have a 3d model for each possibility. So basically no frames, just 3d.
That's is a big if though, chances are C2 will never support 3d directly.
In the mean time you can practice by making your models as low in poly count as possible.