need to install OSX on an imac with os9, without admin priv's

[corosus]

hi.
i work at a local student paper where they use an imac. the old sysadmin was kicked out (some time ago) for misuse of equipment.
now we're trying to upgrade from os9,0 to osX.
my knowledge of mac is very limited ( i try to stay away from the thing, the previous contacts have led me to the conclusion that we don't agree ;-)
i need some help because the previous sysadmin refuses to give me the administrator password to this thing.
how can i get a mac t boot from cd (I just want to install OSX)
the current OS9 refuses to change the start-up drive because I don't have the privileges to do so.

Tips are very welcome, thx

[Mac Medic]

try resetting the pram, i have no idea what the key combination on an imac is to do this but you will find it at the apple website, then boot of the CD while holding down the c key.