Always install/extract products into an empty temporary folder.  Give the structure a look, then place the library folders where you want them, drop the extraneous stuff (ReadMes, promotional pics, pz3s, etc.) where you want it, then drop the rest where it belongs.

Vendor habits WRT dir structure are generally pretty absurd (checked out your libraries folder lately?), but this will at least allow you to know and control where the library folders wind up.