I downloaded the enthought Python package which come with a ton of useful modules. When I write a script which I try to run as a tool in ArcGIS 10 most of these modules are not available. For example, I want to use the netCDF4 module to download netCDF files off of the internet and then use ArcGIS tools to manipulate the netCDF files. The problem is when I run the script in Arc it gives me an error when I try to import the netCDF4 module, saying this module does not exist. When I run the script standalone, this module does exist in the enthought package, but it does not exist when I try to run it in Arc. Can someone please explain to me what the issue might be, and how I might write a python script that runs in ArcGIS 10 which downloads a netCDF file from a database on the internet? Thank you!!!