2da item prop issues

[Legacy_Greyfort]

               I'm trying to creat a 2da file that alters the keen atribute so it gives a enhaced critthreat prop example

property list

+Critical Threat
19-20
18-20
17-20
16-20
15-20
14-20
13-20
12-20
11-20
10-20
9-20
8-20
7-20 and so on

this will make the critthreat range changed, my issue is making the list correct and the value I know from the baseitem but unsure how to get that other then know what values are from 2da

88         112016  Critical_Threat                  iprp_crithretype   1       31                ****           112016         112017

this is altered line in ItemPropDef 2da file it calls type so I can make list show type, then points to alteredcosttable (so I can add subtype) and that points to filename costable ware i have my types and values but im glitching stll any idea.

I'm trying to adjust dialog.tlk to list in toolset appear corectly, but thats easy the big issue it adjusting that dang keen to alter crit threat.

I would be greatful for any ideas, I've probly forgotton something simple.
               
               

               
            

[Legacy_FunkySwerve]

               Keen points to costtable 0, which is iprp_base1, a blank 2da. This tends to confirm my suspicion that you would need serious engine hacks to pull something like this off. In any event, this belongs in the custom content forum.

Funky
               
               

               
            

[Legacy_CID-78]

               all item properties are more or less hardcoded. It's easier to add your own keen itemproperty then changing the existing.
               
               

               
            

[Legacy_Greyfort]

               I assumed It was hardcoded,  My issue is ware to find the info that acts like keen.  Keen doubles the crit threat range. A one time call not stackable.  what might be the work around that one.

Custom content ok thanks Funky