Question about Deactivating Account

[Groo The Perverted]

Okay, lemme ask this question here. Say you have your psn account active on 5 PS3's, and you get a new PS3 but you can't activate it on there, due to the 5 activations limitation.

How do you deactivate the previous Ps3?

Do you simply log into the user account (in my case GrooThePerverted) and go to the system activation thing, select video or game and then deactivate the system?

Will that affect anything else on the system, as far as other accounts?

Because I still have my older account (pre-groo) on there, and I didn't know if I deactivate the system, if it deactivated it JUST for the Groo one, or if it'll deactivate it for all accounts.

If that's the case, how do I make it where the Groo account is deactivated so I can put it on the new PS3, but still have the other account able to download, play and view movies and games?

Thanks!