Billboard ? I think you are talking about Billabong.
Naw, relax...We have the stock flash available in the L6/L2 downloads section, just flash it and everything will go back to normal.
We also have the stock font and also a bunch of custom font in the L6/L2 downloads section. We have about everything you will need. And how do you mean the menu button lines ? Read the instruction on how to install the "Skin" and everything should work fine, I have tested it myself and everything is working great.