Projecting an image with the wrong display profile

I've just spent three hours with a friend and his projector/laptop. He uses it to display images at a photography club, and recently he's had trouble getting a satisfactory projection, with display size and colour rendition.
The laptop is a MESH 1366x768 running Windows 7 and CS4, the projector was a Canon SX80 1400x1050. They were connected by VGA.
1, as the projector and laptop monitor were different native resulutions, I established that the Windows needed to be set to external-only for the desktop to assume the projector's dimensions.
2, I noticed that he'd calibrated the laptop's display, so I made sure that Display 1 (LCD) was using the Spyder profile, and Display 2 (SX80) was using sRGB.
3, I set the projector to sRGB mode and zeroed all its adjustments.
The colours were awful, and no amount of projector adjustment helped much. Eventually, I tried a bunch of sRGB images in the projector's USB port, and I realised that the zeroed state was actually pretty good - so it turned out that the laptop was the problem.
I took a flyer, and ditched the laptop display profile, replacing it with sRGB. Bingo! The projector's VGA display was now very similar to the USB display.
I put the calibrated profile back on "Display 1", as a sanity check, and confirmed this was the problem (and, before you ask, yes I restarted the applications each time I changed the CM settings).
So, the question is: what the heck is happening here? Is Windows 7 delivering the wrong profile to CM Adobe software, or is Adobe only looking for the primary display profile? Am I missing something?
Thanks for any insights, and restoration of my sanity.

From what I've read, some display drivers don't allow the distinction of using different profiles for multiple displays.  Someone no doubt took a shortcut somewhere and assumed there would/could only be one display.  Given that the laptop in some modes can share the very same display with the VGA port, this isn't that surprising.
I don't know whether this is something that might have been corrected, but whether a newer driver has been released for that laptop might be something to check into.
Laptop display drivers are typically not available from the chipset manufacturer, but rather the laptop maker, and traditionally in general they don't do all that good a job keeping up with technology, so there may well not be a driver update available.
-Noel

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