Hmm, You cannot use CD drive unless Admin give you the access. and also, if you dont have admin privileges, you canot access BIOS as it will ask to put password when you try to access it. Only thing is, try to convince Admin for the access.
I dont understand your First problem?all the users do not remember their passwords, you mean the Human user dont remember pass or the User Account in system doesn't remember the pass?, If its system, there is no option that you can save your / remember password like Firefox or Explorer.