I have one doubt. How can I unlock the equipment? I've completed all star marked objectives and I couldn't unlock all the equipment! I really would like to use the ultrasonic emiter, or the other gadgets...
What can I do?

Get the latest patch.

What if I can't get the latest patch?
Isn't another way of getting the equipment?

One more doubt: How can I return to sticky camera mode? I can control it when I fire it, but when I leave it, I can't find a way of re-utilising it.

The 1.02 patch is the only way to get the unlocked equipment.

the unlocked equipment works only on xbox 360.
he isn't acting on computerach personal

Unlocked equipment works ok-ish with the 1.02 patch. That was the whole point of the patch As for the Sticky Cams, try 'v' or '5'.