It was requested of me, so here we go:
1.) Head to here: http://fiddler2.com/ - download fiddler, it's essentially a "packet sniffer" for http requests
2.) Download the beta profile thingy from https://us.battle.net/account/manage...a-profile.html (obviously according to your country of origin)
3.) Run fiddler, it'll look like this: https://i.imgur.com/DUGaTzh.png
4.) Run your bnet beta setting uploader with fiddler running, it should end up sending you to a tab with battle.net open. You want to see something like this: https://i.imgur.com/XUUc6uU.png
5.) Click "Composer" we're going to mimic the beta uploader's post request https://i.imgur.com/KA2eVzk.png
6.) Drag that line from 4 into the composer, a green box will form around it
7.) Change w/e you want in the string &item=TEXT YOU CHANGE - you'll see a pattern like that, if you're struggling google "HTML Encoding/Decoding"
8.) Hit execute, head to the beta profile, should look something like this: https://i.imgur.com/8F37vbO.png
Enjoy!