I was trying to get that to work also but ran into the same problem of it working on only my main character. I believe Mr PWizard tries to explain this in his instructions but you never know. If you want to affect LP on all characters I recommend using the CoSMOS tool the Gods here at CH have provided us with. Simple stats like this are easy to alter and require no special coding skills. I wouldn't recommend setting the new value higher than 30K or else you can run into an issue.
This should also work for HP, MP, and XP/Leveling Up but haven't tired it yet.
I've found a way.
Just "disable" all character and let only the character you want to "boost" and then you can change his HP, MP, XP and LP one by one
PS: Can't you add in trainer changing color for background ? Like line one is black, second gray, third black, fourth gray etc ... Cause it's sometine difficult to see what line is what.
[Edited by juge-gabranth, 2/3/2018 1:37:56 PM]