[Dodakaedr]

roman_kudin@vk, задайте параметры размещения таким элементам как WizardForm.DirEdit и WizardForm.DirBrowseButton

Код:

[setup]
AppName=MyProg
AppVerName=1.1
DefaultDirName={pf}\MyProg

[CODE]
procedure InitializeWizard();
begin
  WizardForm.DirEdit.SetBounds(ScaleX(5), ScaleY(150), ScaleX(WizardForm.DirEdit.Width), ScaleY(WizardForm.DirEdit.Height));
  WizardForm.DirBrowseButton.SetBounds(ScaleX(WizardForm.DirEdit.Width + 10), ScaleY(150), ScaleX(WizardForm.DirBrowseButton.Width), ScaleY(WizardForm.DirBrowseButton.Height));
end;