Linux vDisk - When Do You Install the DEB/RPM File?

[trymeout]

In this guide below, it is not clear for distros such as Kali Linux on when to install the DEB file. Do I install it before I install the distro into Virtualbox, after I install the distro into VirtualBox, After I run vtoyboot for the first time?

https://www.ventoy.net/en/plugin_vtoyboot.html

[longpanda]

After you finish install the distro in the VirtualBox and reboot into the new installed distro. (before you run vtoyboot.sh)

[trymeout]

Thank you