If you are looking for the simplist, acquire Knoppix's latest version 3.4 or 3.6 and install over the old 3.3. Easy and fast. If you are looking to update 3.3 without an upgrade to a newer version APT-GET is the way. I'm using 3.4 and 3.6. This is being written on 3.4. Regardless as to which route you take go slowly. It will work out. I crash one of my systems about once a week. It is not the distro but my playing ideas that don't always work. Have fun.

William