>In an import I just did, I save the configuration to a package.
>However, when I go back in Import, how do I find this configuration file
>in order to avoid doing all the configuration steps again?

The SQL Server Books On Line topic "Running Packages" discusses different ways to run an SQL Server Integration Services package. (See also: Designing and Creating Integration Services Packages")

The major options (in no particular order) are: 1) run it in the Business Intelligence Development Studio, 2) use the utility DTExec or DTExecUI, or 3) create a SQL Server Agent job that executes the package.

If you saved the package to disk, you can open, modify, and run it with the Business Intelligence Development Studio. Use the dtutil utility to copy a package saved to a database to the file system.

BIDS is installed with SQL Server 2005, except for the Express edition.

Chris