i think the easier route here instead of decrypting an MD5 would be to create a new one. you can visit this site, put in some text string and hit convert, it will create a new password encrypted for you, copy and paste that MD5 into your dbase table. save and you have created a new password for the admin.
if you need further help, we are here for you,
later,
DosDawg
http://www.md5-creator.com/