Content Question

[jshows1]

I just downloaded and installed Akkadius' install pack and it worked great (thank you for your efforts, Akkadius!).

I just have a question about the content for each expansion. I'm assuming tons of work has been put into the early expansions over the years to ensure that the content (mobs, items, zone population, etc) are pretty accurate.

My question is this: Which expansion does this accuracy go up to? And are there anythings I need to be aware of that I may need to manually adjust if I want to make a classic server through PoP as close to what it was back then?

Thanks!

EDIT: To be fair, I realize that the work done on the database is in relation to accuracy by today's standards. I realize I will have to go back and edit the database to get a "classic-like" feel (impossible to be strtictly classic).