Well, when I said about the install script, I was refering to maemo 3 o maemo 4. Both have installation scripts. With maemo 2 is more complicated.
I understand that iphone sdk and wm mobile are easy to install because they are GUI tools, and you only need to do double click to install it. But maemo sdk is not dificult to install, if you follow the instructions (again, not so easy for maemo 2, but they have learned in next versions, also with maemo eclipse integration). I think I forget some options of how to develop for maemo, if I find it I will post it.