Well, the short answer is that I don't know if I can help you much on this. Following one of your links, I found a Wireless Quick Guide
(sorry,its in English, but there is probably a Spanish one on that site somewhere), and that suggests the connection between the computer and the projector is basic wireless TCP/IP. That document also shows a web interface to the projector, but I can't tell if you can run a presentation over that connection.
The Windows software seems to require DirectX, which suggests to me that there isn't going to be a Linux replacement for this. I think you are likely to be looking at either re-installing Windows, trying to use a VM, or trying something like Cedega and see if that can handle the software.
Sorry, but this could along the lines of Windmodems, where there really isn't a decent Linux solution.