how to put the login psn on my ps3 with psgrooove, trophies to win some games I downloaded?

help me please
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Hello everyone, this is my first post created, then I would help.

I have 2 ps3, a 60GB FAT (with PSgroove) and a 120GB Slim virgin.

on my 60GB PS3 I'm not with my psn account because it left the ps3 with my brother (10 years) so ...

would account for my psn trophies in it to win some games I've been coming down, they are old games, I have no desire to buy but which contains trophies.

could you help me?