Random Usergroup On Registration

[yzztik]

I have a hack installed on my board that randomly places a new user in one of 6 groups upon registration. The problem is that I did not install the hack, it was my previous admin and he is now gone. I need to upgrade my board but can't seem to find the code for this hack to re-install it after I upgrade.

I have searched the board and cannot find it. Does someone know what it is or where I could find it?

I am not sure if the hack I had does this or not, but I would like it if it could somehow know how many people are in each of the 6 groups and place the new one in the group that has the less users in it.

If someone could write that for me or point me to a place where I could find this I would be forever grateful Thanks!