Convert Safari to Go files to ePub

Safari to Go stores offline bag files in \data\com.safaribooksonline\files\zips. Each book has it's own directory with files that make up the entire book (xhtml, metadata, etc). Has anyone tried converting these files into ePub? Safari to Go cuts off the bottom of the pages (i.e. cannot read full content). That's why I want to convert it to ePub instead. If not, is there any other way to read *Safari to Go* content?