We get this question alot
Depending on your setup, one way is to use a PC with a graphics card that can support three monitors
http://www.eventdv.net/Articles/Read...rticleID=37848
http://www.tomshardware.com/forum/18...-span-displays
You then need to split your desktop across the three outputs, use the VGA/DVI connection and run your video across the three monitors. In theory this should work have to say I have not personally done this specific configuration.
Since you are dramatically magnifying the image, usually it is recommended to have a high resolution image to start with
Couple of points to keep in mind
The matrox trypplehead2go, attaches to the vga output of your system, they have two versions analog and digital, if your projectors are analog, you need to get the analog version. At the same time you need to make sure your video card on your player will support the triple resolution you are looking for, Check out
http://www.matrox.com/graphics/en/co...s/home.php#dws
You need to look at the resolution of the three projectors (need to match) and then make sure your video card supports 3x the horizontal resoulution, also you need to make sure that your video playback application will support this resolution.
Potential problems is there is no edge blending, but also unless you use a dual video out card on your pc you are going to have the pc desktop also be visible. As I said I have not had the the time to test this all out, but it is something I am looking at as more and more people do want to split stuff across multiple screens
Outside of your budget and Mac only there is a product called ProVIdeo Player
http://www.renewedvision.com/pvp.php
Worship systems are starting to use this feature, and so prices are starting to come down
This approach gives the most flexibility but has higher cost
There is also a product called Arkaos, which offers another alternative
http://www.arkaos.net/software/vj_description.php They have a free trial that you can down load and works for 21 days with no limitations
Another approach, get three identical dvd players, make up your own three custom dvd's splitting the feed into three parts, and use an IR remote to start stop the three dvd players
In general getting it all to work perfectly is a bit trickey in all cases especially if you don't make your video with the idea of spreading it across three projectors from the start
Sharyn