LOAD_TipBottom is the GUI Image's name. You can replace that with whatever you like, as long as you include the chat box. RTB has a built in hook for adding tips, RTB_addInfoTip(%tip,%nobindtip,%category); If you want to change what it says, you can first do:
deleteVariables("$RTB::InfoTip*"); $RTB::InfoTips = 0;
before adding your own.