i say its a straight forward DIY installation, disconnect the battery before you install the seats. Their are some cases that the seats can deploy being unplugged in or out. Connect the wires from the si to the fn2r seats, its as simple as that, also line up the mounting points of the rails and screw them down. Make sure you the correct tools if you plan to DYI, thats the number one thing i say.

Mighty car mods on youtube as an installation video that might give you insight installing aftermarket seats. Just search "mighty car mod aftermarket seats" on youtube and you should find the video.