i've posted a integration of flashchat 4.5.7 for integramod.
in the zip file you find 2 option or you install the plain version
this is without autologin.
and a autologin version witch pulles username and md5 encrypted password out of the db.
the autologin contains 5 extra files and you will have to overwrite a file to make it work.
so always make a backup of your flashchat system also before uploading.