Setting up a Network [resolved]

[mrstuff68]

Recently I helped a buddy setup a network for his business. It was basically 2 Microsoft XP computers connected together through the home network function that is available with XP. Well needless to say my buddies business grew. Now he is going to be moving to a new location and is going to need to have a network of about 6 computers set up. Can someone give me some info on where I should start and what is the best way to tackle this job. We currently have the 2 computers connected through a dsl router. What needs to be done with 6 computers? All suggestions are welcome. But some of the things that I need. All computers need to access info on one harddrive, or in one location, since all workers will share the same data. Are there any programs that I need to make this as simple as possible? Can I still network all of them using the XP home network function. What obsticules do I face? Let me know how I can complete this, since I have never done something like this.

Thanks to all that reply.