I take it that when you say "publish", you are using the publish command from the "Build" menu... if that's the case, then yes, when you get the output package from the Publish process, and then install it, it does install it into a subfolder of <SYSTEMDRIVE>\Documents and Settings\User\Local Settings\Apps\2.0. That is the folder you are seeing when you get the value from the "Application.StartupPath" property.

If you just copy your EXE (and any required supporting files) from your "Debug" (or "Release") folder to another location on your machine, the "Application.StartupPath" property will show you the correct location.

Thank you, this seems to be the case.

Now, is there any way to define where do I like to install my app?
The setup tool don't allow me anything, just works a little, then it installs to that folder..

You may have to create a custom deployment package to do this-- the default MSI creator doesn't afford you many options, but the deployment package project does:

http://msdn.microsoft.com/en-us/library/ms228283.aspx

Thank you very much.