Hi Barry,
When you say you want to keep the data on both computers the same, what is it you'd like to do? Did you want a way to have somewhere to store documents/photos that both PCs can access, or do you want your personalisation settings sync'd on both computers (i.e. the same background, etc.).
If you let us know a little bit about what you had in mind, then we can advise further.
Did you need advice in terms of the networking process? Most often, the easiest way to do this would be to connect them both via a cable or wifi to your internet router (assuming that's how you get online).