The wording of that message is one of my pet peeves (before this it was referring to "Login Items" as "Startup Items" prior to "Tiger"). It bothers me because despite the message, "permissions" have nothing to do with why a user is unable open that application. Of course, "permissions" can affect a user's ability to run a programme, which makes the message more misleading. A parent would normally be expected to have a lot more important things to do than read up on the nuances of "permissions" vs. user management / '
mcx_settings' or hanging out on forums, so the elimination of obvious sources of confusion like this is something I would have expected the old user friendly Apple to strive for.
Anyway, that message appears when a "Some Limits" user attempts to launch an application that the "admin" has not selected in the "Accounts" pref pane ("approved", perhaps, which is the term used in '
mcx_settings') for use by the user. Hence the user is not "alllowed" to use it. In this case, it could be that "/Applications" > "Utilties" > "Installer.app" needs to be added to the "AccessList", or if it is a stand alone installer, the item on the CD may need to be added explicitly through the "Accounts" pref pane, in order for the "managed" user to be allowed to at least start the installer themselves.
However, installation by a non-admin in the "/Applications" folder would require an "admin" password anyway, so as "macjack" has suggested, installing from the "admin" account is probably the best course. I just couldn't pass up an opportunity to rant about that stupid message...