The Trinity systems do come with software, but it is with a sort of scaled down set of software. A lot of systems (perhaps as high as 50% of our clients) use lasers in a Live application, such as a club. For this reason, the software that comes with these Trinity projectors is quite good for Live type applications, but (depending on your application) maybe not so good for what we might call "studio shows", or pre-programmed graphics or beam shows. However, those projectors do have a DB25 such that you can connect a "normal" Pangolin system to the projector, such as our LD2000 series. The LD2000 series includes Lasershow Video - VST, and other goodies...
Regarding the largest screen, I think you should inquire with NEO-NEON or with a NEO-NEON dealer about this question...
Best regards,
William Benner