Increased 15 second timer to 35, XP system wakes up on command as expected, but the laptop's internal/external display configuration is not set correctly on wake-up and I must press the FN+F4 key to get the screen to come back on. Interesting.

Additional interestingness. When I use your Doze program, it does not induce this problem, but using PassMark Sleeper induces that problem. (But the screen is working when Sleeper wakes up.) I wonder what's different about the two?