Seriously though, remove everything you can from the arm first, then make sure all cables are freed up and then just unlock it. It's not difficult... hell, even I have managed it a few times!
Lenco '88' - Kuzma Stogi 'S' - Decca London Super Gold
STD 305S - Jelco 370D - Goldring Excel GS
Technics SL-DL5 - Digitrak 300se
Sugden Optima - Ming Da MC-7R - Audion Sterling Plus - SD Acoustics SD-5's