I seen some other posts around here, some people pointed to an update.zip made by Pete which only works with 2.0.1 I believe. I tried this on Ultimate droid 6.5 and it just messed up the images, altough it seemed to be the old lockscreen, just the images were messed up, so I assume it just needs a little tweaking to work with 2.1 ese53.
Also I don't want that market app. So don't post about it. I think you can still pull down your notification bar with that lock app running.