Boot Netrunner from legacy BIOS

I want to install Netrunner on my old HP Pavilion dv6. This laptop only supports old legacy BIOS boot. Is there a way to boot from it Netrunner 23 Vaporware? If no, what is the latest Netrunner version (except Netrunner Core) supports legacy boot?

I had no issues installing Netrunner 25 on my older laptop in legacy bios.