The bit with the tick box you click after char select is in the Notice folder.
The bit that says you are being connected to the server please wait a second is in your CMlist.dat file
The bit that says Welcome/Intergral Amount is part of the UserLogin script which i think is in QuestDiary/HLSCRIPT/UserLogin.txt Im not sure though as i rewrote my Envir folder to something more managable.