If anyone is interested i have a pre setup debian VM that runs in virtualbox ( all you need to do is install virtualbox - windows, macos etc) -
https://github.com/db260179/ps3syscon/tree/master/VirtualboxVM
For now its a case of copying these files to the VM's folder in /var/www/html (virtualbox has a built in file manager to do this for you) - just read the docs at the virtualbox site.
Then point your ps3 web browser to the pc running the vm, simples!
I use this when i have ps3 motherboards that where still on old ofw below 4.85, but now this is out i can add these files and make a new vm image.