Your padlock won't be super-duper-hard, but check out this link to give you a helping hand:
http://www.lockpicking101.com/viewtopic.php?t=10665
Taking it down to like 2 pins will ease you into it, and should have you opening them quickly. I'm going to say 3 mushroom pins with fairly shallow serration.
Insert the pick and press the first pin upwards, push the pick backwards untill you feel the next pin, and keep going untill you find where the 5th pin is. It will feel like there is another pin, but this is just the retaining pin for the plug, and stops it coming out. Once you know where all the pins are, go through and find the pin that feels like something is scraping on it when lifted gently. Lift this pin gently and slowly untill you feel it set - the bottom pin should now just fall down, and if you lift it, it'll feel very light since there is no spring pressure being exerted any more.
If you get to the end and you feel the plug move (As if you've unlocked it) but suddenly stops after a few degrees then you've hit a security pin. Apply a lot of tension and lift each pin slowly - the plug should turn against the way you are applying tension. Keep going untill you feel like you've set it again. If you've only locked one security pin then the lock will open, but if not thewn you've caught more than one which simply involves following the same proceedure again.
It's likely you'll mess it up laods to begin with, but there's a knack that yiou very quickly get used to when picking these sorts of pins.
Good luck with it though buddy - Let us know when you pick it or run into troubles.
Ben.
