Don't know how do this with section

I have sections

SectionGroup B
  Section A
    SetionIn RO
  SectionEnd
  Section B
    SetionIn RO
  SectionEnd
  Section B
  SectionEnd
SectionGroupEnd
Section -finish
  CreateShortCut...
  WriteUninsta....
  InitPluginDir
  File /oname ....
  ExecWait regedit /s ...
  Delete $PLUGINDIR...
SectionEnd

If I run setup, then I see nice installer.
I want write this code, when I run setup with parametr config, all section skiped. Only last section -finish write his code.