Christian,
There are a lot of variables in your question. Certainly, Microsoft Access can handle eight users simultaneously. I assume you are talking about XP Pro?
It also depends if you are using Citrix or not? Citrix can be a lot faster due to the need for only mouse clicks, keyboard and screens, etc.
How fast is your DSL? I don't think eight doctors connecting from six clinics is any different than from one office.
Is this your own server at the hospital or theirs? How fast is the server, i.e. processor and RAM, etc.
I only have one suggestion: Since there are quite a few ways to set this up and some are faster and some are less expensive than others and others are more secure than others, I would hire a very good networking IT to consult. If you are all doctors doing IT on the side, you will never know if the situation is doable.
Hope this helps.
Cheers!
