I doubt it...I bet it does just like Kpackage does. You have to pardon my ignorance on Kpackage...I'd just never used it for anything other than opening a single deb. Mind you, I've never actually tried doing so with Synaptic...I always just went and used dpkg on it or got the app through apt-get in the CLI. So I spose anything's possible. But after trying Kpackage through the repository as you've been using it, I must say that it isn't a bad way to install things...and I think it might actually be better than Synaptic.