I work at a college and we have macs in our classrooms. There are 6 user logins, (lab manager and 5 class logins). We want to set disk limits for each class login. For example, we want each class to have up to 20gb's of storage for their login. Can this be done? We are on a budget too. If this can't be done, what are our alternatives? We only have 80gb hard drives in the macs so it would be a hassle splitting the hd into 6 partitions and installing the OS on each partition.