If you work with Cytoscape a lot, you can use this plugin to directly import MetNet pathways into Cytoscape, rather than exporting XGMML-files through the website.
How to install?
You need to download 3 files to your Cytoscape \plugins folder: metnet3.jar, MySQL JDBC driver and metnet4.jar.
Once you start Cytoscape, click on the Plugins menu. You should see a new item "MetNet4Cytoscape". Click on this, and you'll be able to download any pathway in the database in a 2-step process.