You would have to search your database and remove all instances of the installation.. You can do this in phpmyadmin, but if you don't know what you are doing you can hose your database.. Not recommended.

when you uninstalled the mod, how exactly did you do it?

my friend did it for me, who i no longer talk to lol.

so i have no idea, and yes i would hose my database probably

You could try re-uploading the .xml file for the hack "allowing over writing" and then try just disabling it and see if you get the errors.

ok i will give it a try lol

is it easy to remove stuff from the database? is there a special way to do it?

You should go find the modification and read the installation file and then undo everything your were supposed to do to install it. It could be that you just left a couple of files still uploaded on your site and that is what is causing the database problems.