>>3. It seems that at this number of concurent user and sales transaction you should use true server rather then peer to peer environment
>
>I'm with you: I think this point should be # 1, and in capital letters ....
>
>The whole setup appears to be in question. False economics.

It can be something like that. But decision to properly upgrade may not be as easy because of economic reasons. For example in my country it is 3-4 times more difficult than in USA. I have few customers that have sometimes problems of similar type but they do not want to buy proper OS because they are short of money. They can live with it someway.