{HELP}-bat file integration in inno setup script

[ffmla]

Hello helping mind people,
i've some doubt about inno script installation.

[For Example]
For making compression i've
data1.arc
data2.arc files.
In data1.arc contain some files and iwd.bat file.

I need to extract the above files using inno script.
After extracting data1 &2.arc using inno script,then call the iwd.bat{Rebuild game data} along with installation.

I need progress for
data1.arc -33%
data2.arc -33% then
iwd.bat execution 34%{need silent install no popup}

INFO:
now i am using iwd.bat in Run section command in post installation section.

i've find the code in other source{i don't know how to implement}

if not ISExec (0, 0, 0, ExpandConstant ('{app} \ iwd.bat'), ExpandConstant (''), ExpandConstant ('{app} \'), '...', true) then break;

i am using BB script,if anyone understand please give the details