Ok, so here's how I did it:

1) You have to enable the second screen in the gfx control panel

2) You have to set it to "extended desktop" and then enable "stretching horizontally"

3) This is where the PITA can occur: You have to select a resolution for the combined monitors. In the ATI control panel I had only 4 different resolutions availiable and only one would work for me (2040x768 ), matching closest my desired (akward) resolution of 2384x768 (I have a 32" LCD-TV (1360x768 ) and a old 19" CRT (1024x768 ) => 1360 + 1024 = 2384)).

So the image on my LCD-TV is stretched by ~300 pixels.

I tried to add the custom resolution with Powerstrip, but I could only add it to the resolution list of the separate monitors, but not to the list of the virtual stretched display. I hope this makes sense .

Maybe it's easier with Nvidia cards or with two normal monitors.

Anyway, you should end up with the desktop - AND THE TASKBAR!! -stretched over both screens. If the taskbar is only displayed on one screen, you did something wrong!

The Shkval-screen needs to be the left one (with the "Start" button) the main screen the right one (with the Systray and the clock). Of course you can put the second screen wherever you want, but it needs to be the left one settings wise. If it's the right one, select "swith screens" in your gfxcard control panel.

4) In the BS options you have to enable "2 Screens - Shkval+Monitor" and select the virtual resolution (2040x768 in my case).

Exactly. If you have only one monitor and enable "shkval+mainscreen" in BS, the image is split vertically in the center (shkval left, screen right).

It's a very simple solution that forces you to use the same resolution on both screens.

So the more different the two monitores are by the means of resolution and aspect ratio, the worse the image quality will be. For example a combination of a 26" widescreen monitor and a 4:3 8" LCD will not work satisfactory.

woohoo!

AMD X2 4800+, 2 x 20" screens, each running 1600x1200, NVidia 7800GT in horizontal span mode, BlackShark running in full screen mode. Adding the Shkval and ABRIS to the second screen costs almost zero FPS.

Center =
{
x = 800;

I've finally sussed it out, thanks to all involved.

After playing around for the last 2 hours with various settings I now have the following setup:-

17" Monitor on the left (1280 x 1024), 22" Widescreen on the right (1680 x 1050)
The 17" screen has the ABRIS and Shkval with a vertical split, the 22" Widescreen has the main cockpit. No slowdown, all aspect ratios correct and working fine.

I'll get some screenshots on tomorrow for anyone interested. If anyone want instructions as the ones I've read on various sites have been fairly complex and often contradicted each other. If anyone has real problems I'm happy to send the required files/configs for whatever monitors you may have as I can do it quite quick now.

@lucky
The ABRIS and shkval are purely visual in a multi monitor setup. No buttons to press on the ABRIS its all still done in the cockpit, it just make things easier to see/read.

SD