Shoutbox

I very rarely turn off my computer..and I usually keep several chat windows up, yet from what I've noticed..it only saves the chatlog when you close the window.
Doesn't help when MSN crashes while these windows are up & I lose several days worth of chatlogs.

So simple question here, just wondering if it was possible to automatically save the chatlog for all open messengers windows every..say, 24hours?
And if this isn't possible, would it be possible to create a script that would add such a feature?