Viper, I was wondering if it would be possible for you to send me the source to this installer as I am currently in the process of self-teaching myself and would like an example to work off of. If you would like, you can remove parts you think would be too... sensitive for me to know (like the IP (I'm assuming) used to update).
But, I would be happy if you can leave as much of the net integration intact possible, but, of course, it is your choice.
Are you after the entire code base or specifically the update checking code? I've put a reasonable amount of effort into this and I'm a little hesitant to hand out the entire code base...