Kickstart - Configure wireless before the start of the installation

Hi,

I would like to install RH8 on a laptop whose the only ability to connect to internet is a wireless network.
The aim is to activate the wireless before the installation to get the packages through http/https URL.

I saw the "--essid" option on the network command. However, I didn't find a real sample on how to use this option. All the configurations tried have failed.

Does anybody has already connected a machine to the wifi with kickstart?

Thank you
Rachel