If you get a greenleaf (Garcia y Vega or Dutchmaster) then it will probably be more moist and burn slower. Greenleafs are the way to go, anyway.
roll it tighter, and lick your fingers then spread the saliva around it where its burning, this also helps when its burning too fast on one side
I find the hollow out and re fill method makes them burn way to fast. if you reroll that whiteowl and can roll decent you shouldn't have any problem. Also adding a bit of the tobbacco back into the mix seems to slow it down. for this purpose I find a pipe tobacco cigar (like a swisher) to be best.
chocolate phillies burn slow as hell but im with the first replier, go for the leaf(dutch's are my choice) over the paper.