Hello Olivier,
do you mean how to configure and how to access the device?
if it is new you should try to setup a console connection to the console port of the supervisor.
You need to use the console cable that is provided with it with an RJ-45 end and a DB-9 connector to be placed in the RS-232 of your PC.
After an initial configuration on the console you can then telnet to the switch.
Edit:
a GUI environment for C4500 exists named Cisco Network Assistant and its usage is described here:
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/46sg/configuration/guide/netasist.html
Edit2:
I've seen in your other thread that you have already setup your C4500 for CNA access: so forgive my notes in this post they are useless for you.
I can tell you I never used it.
Hope to help
Giuseppe