Very nice remix!
Also, I am so glad that I wasn't the only one that felt that Beginning transitioned into Vampire Killer so smoothly! Half the time I have one theme going through my head, it transitions into the other (and I've been thinking that a mix of the two needed to be done, also I'm surprised how few mixes of these two pieces I have found so far).
But yeah, Beginning needs a bit more love (even though I really love Vampire Killer). ;)
Anywho, I really like this mix and am glad to see someone try it. It would be cool to see both themes transition back and forth as well as merge a bit with one another more, but it works very well the way you did it here! Keep up the awesome work! :D