I need to design or use 5 to 10 PCs (with eclipse) but with the same workspace, how can I do that? I already tried but I can not share the folder of the workspace, please help
What do you want to achieve, actually?
Because the workspace is supposed to be user specific. It contains things like settings, how perspectives are setup, which view to show where. Which means if two users share a workspace they will continually write of each others settings.
And to enforce this, as soon as you starts Eclipse with a workspace, it is locked preventing someone else to use it.
So sharing workspace is not a good idea.
What I guess you really want to achieve is to share the projects between several developers. Using project sets is a good way to do that. Check out my answer for a different question regarding this.
If you want to share preferences with other users, then check out this question for advice on import/export of preferences.