Iirc, lxx4xNx6xxl is going to use the same route as Behemoth (World record holder on SDA). Behemoth got 48min 100% run on PAL. Take a look at his page:
http://www.youtube.com/user/giganotabehemoth87#p/c/2503980255897DB7
Anyway, he is going for early power bombs using the hero shot up in Brinstar shaft, so he can pick up the missile in kraid's area without backtracking there later and this way he can use some pb shortcuts. Go through Norfair to pick up speedbooster, wave beam and ice beam, go to Wrecked Ship, back through Crateria till Brinstar elevator next to the first Super Missile, some clean up there and head to Maridia. After maridia he goes to Lower Norfair. After killing Ridley he goes back and go to fight Crocomire and get the Grapple beam. After that he goes back through Brinstar, heading for blue brinstar area and up to Crateria again, so he goes for the pb up right to the ship and shinespark through the gauntlet, so he goes to Torian.
Anyway, it will be better for you to take a look at Behemoth's page and watch his 48min 100% run, it's amazing.