Damn well its easy to do.. Once you have done it a few times..

Wish i could help.. What CANT you do tho? you say everything is on? Whats on?

Put Crank to TDC mark.. Line up your cams to TDC. both ARROWS pointing UP.. but not STRAIGHT up.. kinda tilted to the front aligned with motor..Then slide the belt on.. Tighten Tensioner.. Turn crank with 17mm about 3 times.. make sure its still TDC.. crank it up.. RIDE OUT