Yes, those are hardware modifications and it costs several hundred dollars (USD) to have them done to your phone. There is one maybe two shops in Japan that will do an international order for people who live outside Japan and want their phone modified in this manner. But most shops who preform this will only ship your phone back to a Japanese address, which requires you to hire a middle-man package re-routing service in Japan. These people will receive the package in Japan for you and then mail it to you internationally, at a "reasonable" rate.
To put this into perspective, those awesome looking versions you see on youtube videos are sold for $800-1500 (phone included) on yahoo auctions Japan; that's a $500-1000 increase over just the price of the phone!
They carry little to no warranty, void your warranty with the phone manufacture (in this case, NEC) and have been known to break (have a LED go out) fairly often requiring you to send the phone in again for repairs unless you yourself are skilled enough with a soldering iron to do so.
If you have a ton of money and want one badly, buy a new keitai, send it in, and a month or so plus several hundred dollars later (cross your fingers) you should have it back! Keep in mind the language barrier if you are trying to describe to them a custom lighting job, and the fact that you probably can no longer go a full day without having to charge your phone! The N-02A eats batteries already like no other. I get a "low battery warning" from trying to watch a video on my phone at the end of the day when only using my phone normally throughout the day.