>This don't works for a NTFS volume, only works in the NT server in local mode, but also only with the first partition, in othercase it returns always 0, and the 'Scripting.FileSystemObject' I think it only worked if the customers has a specific (I think IE5) version of IE.

This last part is not correct - Scripting.FileSystemObject is a component of the Windows Script Host; you do not have to install any version of IE to get it. You can download the WSH from msdn.microsoft.com/scripting