Unfortunately, the source code for CleanUp! is not currently available. I was originally planning on making it publically available, but then when I found that CleanUp! out-performed many commercial products I decided not to release the source code. However, I will consider licensing it to interested companies for a fee (see above question for reasoning). If you're interested, send an e-mail to: cleanup at stevengould.org (replace the " at " with the @ symbol).