Adding username and more "passes"

oooookay. i was looking at the tut for password protection thing you can see it here –

i was wondering if there was a way to add a username. also, is there a way to have multiple “accounts”? This is only ment to be availible to about 10 people tops.

the other thing ive heard of is htaccess, but i dont know anything about that. is there a way i could just use that to store the account?

thenks for any help