For a single album it is probably easiest done by hand once you've located the details on the web. MediaMonkey has a feature called Auto-Tag from Web which might be able to identify the album based on album title alone and fill in the blanks or try PicardTagger which creates audio "fingerprints" of tracks and attempts to match them in an online database. If you use a 3rd party tool to update the tags then you will also need to get iTunes to update its copy of the information. I have a script for that called UpdateTagInfo but for small numbers of tracks playing each briefly in turn should be easy enough.
Message was edited by: turingtest2