Ptter Zhou has released a beta of his Win32 level editor DIE, which you can pick up at this site:
The features will be limited due to some bugs I found last night in the saving, save as, and new functions. so only the selecting part of the editor can be used, prop editing on the toolbar will be possible, but only in the memory, which cannot be saved. So basically it allows people to get used to the FragMaker/DIE interface and try out a few features.
There you have it. Why not give it a try?