I have created a windows batch file that can create a virtual machine on virtualbox with a specific configuration to suit my needs (using vboxmanage). However, you still have to manually start up the virtual machine and answer the virtual OS's prompts (language, hostname) to complete the virtual OS installation. I would like to have my batch file do this for me. In addition, I would like my batch file to install Guest Additions as well. I've read that I could mount the Guest Additions iso file to my virtual machine somehow, but I wouldn't know what to do after that.
I doubt that this can be done since the installation is done on the virtual OS's side and not the host/virtualbox's. Just want to make sure.