Is it possible to do a network scripted install where the nic you are doing the install through is attached to a trunk port. i.e. can I specify a vlan ID in the esx install boot process ?
I'm afraid you can't.
You could possibly use default pvid to the "installation network" to evade tagging and make your installation possible. (after that tagging, network esx vlan configuration is "easily" done through kickstart scripts/post-installation)
Hope it helps