Rock Band Guitar String Mod
If your a Rock Band addict but feel the plastic strum bar if holding you back, it might be time to mod your guitar. Originally a one-of-a-kind guitar mod designed by a somone going by the name A4AJ, is now available as a (patent-pending) kit you can install on your own guitar.

The kit includes everything you need to swap out the plastic bar with a playable string, special strum switch, along with several metal strings, springs and even a Fender guitar pick. Yep, with this mod in place and the tension cranked up, you can play the guitar with a pick!
Keep in mind that the kit does not include the guitar or the wood backboard, and requires that you perform some fairly significant surgery (Dremel, drilling and soldering) on your stock Stratocaster  obviously voiding your warranty.

The kit works with the PS2, PS3 or Xbox 360 versions of the guitar and is currently up for auction on eBay with a starting bid of $75. At this point A4AJ hasn’t geared up production on the kit, so you’ll have to have the top bid if you want this one.
Via Technabob

Wow now thats a little hardcore. I would have to play with one first to see how it feels before modding mine.
The video makes it seem like your just hanging onto the string vs actually strumming it.
I strongly believe you should just go and pick your real guitar and learn to play the song for real.
It doesn’t seem to work very well.