Not sure about the XCam software, but that isn't the only security camera available.
Take a look around on here, but don't buy anything:
Newegg.com - Surveillance Cameras, Security & Surveillance
It is VERY PC technical and you won't be able to fully understand, but hopefully you might be able to notice difference from the price tags. Their inventory is huge so that is why I am encouraging you to look at all products. They also offer plenty of photos of the items they are selling. You can also see how people reacted to it by their comments, by the
pictures under the camera, means how many comments were provided [#].
The way I'll say this: Most likely the newer it is, and (possibly more expensive) the software is quality software that has everything the person wants.
The cheaper you go, the software may be "cheapened" so it doesn't have a variety of options, just basic camera monitor and no "output to web" option.
Yes, each and every single webcam will have it's own CD software that comes with it. What is inside each CD, is different for each camera.
I don't think Comcast guy will do it for you, he can only do things related to your cable problems, just to make sure the internet is working. That is all he will do by his company policy.
Who you really need is some PC guy you can trust.. Do you have a friend or son of a friends? Needs to be intelligent in PC stuffs, as this is not simple to do, you need to have some computer background. Word of advice: Don't use Bestbuy geek squad. You most likely will waste money and time.