It's one of those things that says "if you post this within 20 seconds check your inbox and you will get the code!" it really doesn't work, I've tried it dozens of times. I guess there might be another way but I doubt it.
Those types of scripts are blocked by myspace, if you find a service that works, it won't two days later. But in order for it to work the person visiting your page has to have the same service coded into there page as well or it will just show as a "priviate visit" or soemthing along those lines. It kills me when people post m.s. bullentins claimining to gain speacil features.
MySpace is just full of dodgy emo arseholes, with nothing better to do than post crap saying "OMG MY LIFE SUX LOL HERES SOME SHITTY MUSIC TO MAKE IT ALL BETER".