well i dont know if there is that particular mod, but here is a link to get you headed in the right direction:
http://www.youtube.com/watch?v=KBQgfR1FVV0
in the site provided you can search around a bit and see if you can find it.
Yeah I thought this too at first, but you gotta do a little digging...
When you click the "Download this now!" or whatever it is, on the next site, scroll down a bit to the "Download Servers". Choose one of those, and then it will download.
The youtube video will give you what to do from there.
Ok, hey do I have to do something to Eschaton before opening it, because it doesn't work.
Oh and by the way, you know the concept drawing of Blood Gulch, do you think you could erase that, and just copy a whole new map from the full version into blood gulch?
Have you heard of periods?