Download it here:
Default login and password is admin/admin. It will prompt to change on first boot. Write this down. We can't recover this for you.
Here is the setup guide:
For VM specifics, use this guide (CSA VM installation of 4.3):
I was looking more for docs on how to start with the ESXi5 and VM ware, I already did it once but this pointed me to the right direction, I remember now. Cool.