There was no editor in DP versions only in 1.0.
And yes you do know the answer to this but I'll repeat it just the same, Multi Theft Auto Resources on Google Code
It's there.
..ye i left MTA after DP2 and startet to play samp again, but now after i've seen the big (i mean really big) improvements that have been made since then, i'm back.
I could never dream of going back to sa-mp
In 1.0 you may upgrade your scripts with the 'upgrade' function which updates depreciated functions automatically for you.
And yes hay is updated for 1.0, it can be found on the Multi Theft Auto's resources on GoogleCode here.