Very nice of you not tell the people how you did install the beta without the UDID registration!
I did it also and even unlocked the hidden features for the iPhone 3G like multitasking and user wallpaper.
It`s no fake and you don`t have to pay for anything like registering UDIDs or something..I simply used the redsn0w jailbreak to SSH on my device and editet the SystemVersion.plist by deleting two lines identifying the firmware as a beta.
To activate the hidden features I editet the N82AP.plist by adding the parameters multitasking=true and homescreen-wallpaper=true. Wrote an easy to understand guide with all the legal software you need (not the firmware, you need to search for it yourself!) to get it done.
Works for me and includes the new redsn0w beta2 witch solves problems with the 3G network. All the guides trying to customize the .ipsw files are fakes, this is impossible. You can not restore a non-jailbroken device with a custom firmware! You will get errors in iTunes, even if you try reencrypting the file.
So STOP paying for the UDID registrations and do it the way i did it, until now there`s no other guide on the net, this is unique. This is my guide (my nickname is 3asy):
http://iphonehowto.tk/
Leave a comment here if it worked for you! Took a lot of time to write this guide, don`t waste your time with all the fake guides willing you to work with .ipsws.
To the administrators: Please don`t block me, just finished the guide and want to let the world now how it`s done. I`m not interested in prophit or fame, just can`t sit here and see how the people pay for UDID registration or brick their phones and knowing that it can be done very easy. Click on the Link and you`ll see it`s NOT a fake or Spam..Try it!
I´m new in this forum, maybe I`ll post the whole article in the how to section if there is one! Have fun