I happened to hear "Eyes without a face" on the radio a few weeks ago.
What a fantastic song. I have no idea how many times I have listened to it since then. I have played it on Grooveshark. I have watched/listened to it on YouTube.
Here's a link to Steve Stevens talking about how he came up with the chord structure (starts at 1:15).
Included below is a video of Billy and Steve performing it live in Chicago in 2006.
They've still got it! And Billy still has the snarl!