I had a few requests from people wanting a modified version of _1024_Perspective plugin, that works not just on a quad, but on the whole openGL scene.
I happened to have this plugin internally, so here is PerspectiveMatrix, that does the job.
Layer it BEFORE your bunch of sprites, and they will all match the perspective plane that you define.
Usefull when mapping just one plane.
Sample file included. download from the box.