Plug one end of an instrument cable into the input jack on your guitar, and plug the opposite end of the cable into the jack labeled "Input" on you RP50.
Plug a second instrument cable into the "Output" port on the back of your RP50. Plug the opposite end of the instrument cable into the port labeled "Input" on the front of your guitar amp.
Insert a third instrument cable into the "Output/Phones" port on the front of your guitar amp. Plug the opposite end of the third instrument cable into the "In" port on the back of your equalizer.
Insert one end of a fourth instrument cable into the "Out" port on the back of your equalizer. Plug the free end of the fourth instrument cable into the 1/8-inch to 1/4-inch adapter, and then plug the adapter into the line-in port on your computer's sound card.
Plug your guitar amp's power cable into a power outlet and then turn it on. Plug your equalizer into a power outlet and turn it on. Connect the tip of the RP50's power supply into the DC power port on the back of the RP50, and plug the transformer end of the cable into a power outlet.