Lattice Packing for Tangential Spheres

I am very glad to have become a member of this community. That said, here is my dilemma: I am looking to use a volume (for example, a box) and pack predefined arrangements of tangential spheres. Unlike many scripts of the similar sort, I wish to create this 'sphere' packing using pre-existing spheres that intersect at a single point only (a tangent). I would appreciate any help with regards to this questions. Thanks many!