Fixes for Dark Helm/Blackstone Blade?

Does anyone know of a way to change these two items so their effects aren't cumulative & permanent? I haven't been able to figure it out, but I'm a bit new and only know how to hex-edit basic item stats.

-Poiuyt Man

 

I know effect.mes has the darkhelms info in it and it can be changed simply by text editing it. The helm is aptitude +20, alignment -20 I think.

 

later checked on that and did a reversal myself.
make folder arcanum/data/rules and put effect.mes in it ( can be undatted from the main arcanum , aranum3.dat file. ( see the program listings on this site to get the undat utility).
Then just edit the file with notepad and change the line for the dark helm to whatever you want - even the total opposite effects to reverse the damages done now.