How to test S-video after booting with Angstrom from Koen's Demo images?

Thanks to great instruction pages, I have finally been able to boot my Beagle Board using images from Koen's Demo pages
For the rootfs, I'm using the latest build available:
Angstrom-Beagleboard-demo-image-glibc-ipk-2008.1-test-20080920-beagleboard.rootfs.tar.bz2 <>

After login as root: I have a promt :