make some stuff variable

Signed-off-by: Dominick Grift <dac.override@gmail.com>
add ram, vcpus to install script help

Signed-off-by: Dominick Grift <dac.override@gmail.com>
default to network3

Signed-off-by: Dominick Grift <dac.override@gmail.com>
fix a typo

Signed-off-by: Dominick Grift <dac.override@gmail.com>