Easy MD5 has now been updated to allow you to save .md5 files to disk. This is useful when creating torrents etc. Android Market should automatically update your installation sometime today, otherwise you can manually update.
Easy Hash Compare is an easy to use app to compare the MD5 hash values of two files on your Android file system. It will allow you to know, with some certainty, that two files are equal. You can see the permalink page here, and download it from the Android app store here.