You know yourself best and you might be smart not to attempt this. That said, I just did this mod today and it could not have been any easier. I don't know much about electronics and do not consider myself mechanically inclined, but BD43 sends you step-by-step instructions and there is another thread on this forum with pictures of the entire process.
You will need basic tools like allen wrenches, metric sockets, pair of pliers, etc, but these are all things you should have anyway if you own a bike. Just take your time when taking things apart and do the process in reverse to get everything back together again. I suggest taking digital pictures of anything you are not familiar with before you take it apart - then you know what it is supposed to look like if you have any trouble later.
The entire install took me about 90 minutes start to finish - and I took my time and used this as an opportunity to clean my airbox and filter. The hardest part for me was removing the airbox so I could slide the battery holder rearward. I needed to remove the hoses and had a little trouble getting to the hex bolts on the clamps that secure the airbox to the cylinders, but nothing too crazy. Again, just take your time and be careful not to let any debris fall into the top of the cylinders. I put a clean towel over the cylinders anytime I have them exposed but just a suggestion.
I was really impressed with BD's wire/relay and doing this mod forced me to become more familiar with the machine - which is cool. I just got my FZ6 a few months ago so I am still learning exactly where everything is located. You don't want to be one of those guys on the side of the road who doesn't even know where to find the battery, fuses, etc.
BD43 is obviously a badass and guys like him make this forum great.
Thanks Daryl!