Icons Question

I would line to use a custom set of icons for the Summary image on the ajax-dashboard and for the NWS Forecast icons.
is this a lot of work to change these or is it as simple as creating a new folder and placing the icons in. do all icons names have to match the existing? what procedures need to be taken if this is possible?

Thanks in advance

Scott made some beveled icons for the NWS forecast. There all named the same as the original ones. You just put them in the same folder and copy over the old ones and uploaded them.