Dual screen with Mac

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Hello [H],

I got a Dell 2407WFP to use with my MacBook since today, and I am not liking the way Mac OS X handles it.
I already found a thread in the Apple discussion forums that is very similar to what problems I'm having: http://discussions.apple.com/thread.jspa?messageID=10536436#10536436

It is especially this what's bothering me:

Everyday, when I connect the external monitor, I need to dispatch applications that are opened myself : I move Thunderbird and Sunbird to the laptop screen, I move Firefox to the external screen, iTerm to the external screen, maximize the windows, etc... When I disconnect the external monitor, I need to do the opposite... move all the windows one by one to fit the laptop screen.

Is there any software available that automatically relocates windows or something like that?

Thanks!