I automatically update my iSilo 'channels' twice a day with the folowing command in the window scheduler using iSiloXC. If u r in XP you can find the scheduler in the control panel, your computer has to be on and connected off-course, you could also add this command to the startup folder or a shortcut on your desktop for easy access without having to open iSilo.
<path>iSiloXC.exe -x <isilo.ixl> -u -q
To find iSiloXC (C for Command line) go to:
iSiloXC
There is a version for Windows, Linus, FreeBSD, Mac OS X and Solaris
Good luck ,
Hm