NOAA raster charts on GPS?

Has anyone loaded the NOAA raster navigational charts to their GPS. I have a new Garmin eTrex 20 and would like to add the NOAA charts to my maps. I have the PDF files of the booklet charts that NOAA put out, and I understand that they can be converted to JPG files and loaded to the GPS. Has anyone done this.

Google?
http://www.gpsfiledepot.com/tutorials/creating-raster-noaa-charts-for-garmin-gps-units-with-moagu/



For folks wondering about paper charts -

http://www.paddlinglight.com/articles/tutorial/print-your-own-noaa-charts/

Thanks