something like this
http://www.inkrepublic.com/KnowledgeBase/R2400WasteInk.asp
http://www.inkrepublic.com/KnowledgeBase/R260WasteInk.asp
Definately look into adding an external waste bottle whether or not you use a CIS. The amount of ink spewed out by my 1800 on cleaning cycles is amazing...
whatever system you use, make sure you install a tube to direct all waste ink to an external bottle. This way, you can save time and money on replacing built-in pad.