Hi Magic,
2nd time typing this as I forgot to save it the first time b4 shutting firefox so forgive me if I rattle through this.
I'm assuming you have a separate PCI/PCIe video card and not an IGP. I'm also assuming your card is not an NVIDEA 8xxx upwards series as you cannot use powerstrip on these. They do have their own utility to do the same thing with it but I'm not familiar with it.
Firstly you need powerstrip. Get it here :-
http://entechtaiwan.com/files/pstrip.exe
Install, restart comp. etc.
1) Have computer plugged into monitor and then plug 5bnc cable into second graphics card output. Do not switch on PJ yet.
2) go to settings tab on display properties and enable second screen (to be used for PJ). Just select a simple resolution like 1024x768 for now.
3) Go to Powerstrip and select Configure display. At top of screen, select 2nd screen(PJ) and then choose "Advanced Timing Options". Then select "Custom resolution". Create a resolution of 720x576. Set vertical frequency to 25, make sure the "interlace" box is ticked and also select your screen ratio.
Once that is done and saved, right click on the copy icon (two sheets of paper) and save a short cut for the 720x576i resolution to your desktop (make sure you can see it on the monitor screen) so you can quick select it if things go awry later.
4) Switch on PJ and select BNC input. All things going well then you should have your desktop on it. There will probably be a black box around it as you will need to configure the porches correctly.
5) You now want to make the picture larger by reducing the porches (Black border) around the picture. Go back to the advanced timing options screen for your PJ in powerstrip. Select "lock scan frequencies". You can now use the arrows on the left side of the screen to change the size and position of the picture on the PJ screen. Things could go tits up here and your PJ may not like some of the adjustments and give a corrupted picture (like it is now) or even no pic whatsoever. That's why we have the shortcut for a working picture on your desktop so you can exit PS, double-click the shortcut and get your PJ displaying a working picture again. Better to be safe than sorry.
6) When you have a picture with few to no borders, unclick lock scan frequencies and punch 25.00 into the Vertical geometry fresh rate box because it would have drifted a bit even though it was locked. If it won't accept exactly 25 then you will need to keep nudging some of the adjustments and retrying until it does. You should now have a 720x576i50 picture with good porches. Right click on the "copy" icon to save this new and improved shortcut to your desktop as "PAL".
7) Ok, that's PAL done with but for 23.9763fps NTSC material we can set up a custom resolution for that. Relax, most of the work has already been done. Change the Vertical geometry refresh rate box to "23.976". Once again, if it won't accept exactly that refresh rate then make minor changes to the picture size or position until it locks on. Save the new shortcut to your desktop as "NTSC".
8) Your projector has probably only used 480i60 for NTSC material before and not 576i47.952 so you will need to add this frequency to it's memory bank.
You are done and done, my friend. Enjoy NTSC movies without the venetian blind effect of 480i line structure and with smooth panning due to a fresh rate that is an exact multiple of the 23.976 source material with no juddery 3:2 pulldown effects.
When you fancy some more, do a search for "reclock" and install that. As well as getting you buttery smooth movement from your source PC, you can also use it to slow 25fps PAL DVD's down to 24fps and avoid PAL speed-up and pitch changes using your fancy new 576i47.952 rez on the PJ.
Phew, I hope I don't have to type that lot again!
Good luck, have fun, gimme a shout if I've skimmed too quickly and you want some finer details.
Cheers,
Rob