Follow the guide on the first page except for step 5 and 6. Instead of using the multiply stats dialog I just set fixed stats for the enemies.
On your second post - codebook should be created when you first open the files with PBE. You're probably getting blanks because your .bin files have been edited before. You need to delete them and restart PAD to re-download them, then edit the stock ones.
I just tried that but editing enemy turns in data 21 will only prolong the cooldown of the normal attack, preemptive attacks, which are the primary time-waster, will still trigger. Preemptive data is stored in data29 but when I try to open that file PBE crashes. If you know a way to turn them off completely please share! =D
Still prolonging enemy turns is helpful in some cases and it's easy to do while you're writing in the HP/Armor/DMG numbers. I'll use it from now on, thanks!