How do I make a program I've installed from the repository run as Spot?

How do I make my desktop icons line up? Can I make them snap to grid?

I get a little OCD about such things

Thanks.

I've started the firewall from the control panel, I've even tried running the custom config and turning everything off but ShieldsUp still has me failing two out of three tests (All Service Ports).

How do I become invisible?

Thanks.