Package making guidelines question

[Max Bowsher]

When a packager follows a pseudo-"Method 2" approach, using a home-grown 
script not based on generic-build-script, how closely must the naming and 
behaviour of the script follow the official template?

What degree of automation is required in terms of setup?
Do we require that the included script be capable of rebuilding the packages 
entirely by itself, or is it permissible to require manual tar, patch, etc., 
commands first?

Max.