Alright, so here's what you need:
Around 25 Pages of Photo paper ( For the shiny, nice effect.. Normal paper can be used, but eh.. )
Alot of colour ink, or black in white if thats your style ( Normal paper works best in this case )
Roughly 6 Pieces of black bristol board ( Black looks best IMO, but colour is up to you )
Find a really sick picture you want to be a poster and post it here/PM me it
Tell me how big you want the poster to be
Then, PM me your email. From there I'll email you the file you need to print the poster.
Mine's 1.5m by 2.25m
Doing this for free, post up if you want this done.