Ahhh, I've disovered how to get that FPS Counter:
 
  IGUIStaticText* FPS_Counter = guienv->addStaticText(L"[", rect<s32>(0,0,100,20), false, true, 0, 1); //Where guienv is your pointer to IGUIEnviroment
 
  Then, create a string, modify it to how you want, and call:
 FPS_Counter->setText(string); 
  Don't know how I missed that  
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