Wouldn't be hard at all actually. I was already thinking about doing something similar to this only based on the number of posts instead of group.
To do it, you'd want to create some sort of variable in
config.inc.php that specifies the group number that you want to grant access to. You'd then modify the query in
editbasic.php to extract their group information from the database and assign it to a variable. Then you would create an IF statement in
changebasic.php that compares the group variable to the config variable. If they're equal it proceeds, if not, it spits out an error message saying they need to contribute or something.
Really wouldn't take much to be honest with you.
