When you are in the Saulnier Cryogenics, right after you enter in Paris 4, there are 3 soldiers. Wait until two of them leave then turn off the light. When the soldier comes in, grab him, knock him and pick up the satchel containing a data stick. After that, go to the door and instead of opening it, use the "Optic Cable" option. You should see the other two soldiers running and dieing because of the wall mine. Now you have free path! But this doesn't happen always, to me it only happens the first time.
This really isnt a cheat.it really is a glitch.well one day I was playing and I was in Paris and I picked up a can and was about 2 throw it before the guy sounded the alarm and shot me!!I fell down and then tried to shoot the guy.I pulled out my gun but found I had the bottle in my hand and I was holding it like it was a gun!!!I don't know if it happened 2 you before but it happened 2 me!!i was only able 2 walk around.I then had 2 reset my ps2.I don't know if I can do it again but.....o well!!! Signed, eyes>( (*) (*) )Crazy Shadow>)