I am reading a book about the python programming language. the book says that there is a numeric extension to the Python language called NumPy. I googled NumPy and found a site where i could download NumPy. I downloaded the disk image, and when i went to install it the installer had two options on where to install NumPy. I have partitioned my drive in order to be able to run Windows Vista, i am pretty sure that was one of the drive's that the installer was talking about. The installer wouldn't let me install to my Hard Drive, it said something like: You cannot install numpy 1.1.0 on this volume. numpy requires System Python 2.5 to install. as far as i know i have system python 2.5. so i am wondering why i can't install NumPy? I also downloaded a .tar file from the same site, it is platform independent, i am wondering how to extract a .tar file?