Hmmm.... got my new electronic timer today. I mean, you just have to test it don't you. Here's what I did.
1. Camera on tripod with Tokina 11-16 lens. Set to manual, continuous focus, and metered for studio light that I used, (skyport radio triggers on camera)
2. Plugged in timer and set to delay=10sec, interval=10sec, shots=2.
3. Moved to position 1. Shot autofocused and fired, triggering lights.
4. Moved to position 2 in interval (had 10secs). Shot 2 fired with lights.
5. Downloaded shots. In CS4 made one a new layer on top of the other. Applied a layer mask and selected brush tool. Brushed in the second figure. Because the camera had not moved I didn't need to worry about the edges of the second 'me' as the detail underneath (the kitchen) was static in both shots.
EXIF - used 50mm for this first shot
EXIF