I want to convert this Heroes of Newerth cursor into a cur file so I can use it as a cursor on windows and on my website. The cursor is now in a PNG file with an alpha map, and I have so far been unsuccessful in converting it to a cur file.

The things I've tried is using the Photoshop cursor plugin to simply save the png as a cur. The result was a working cur file with a white background instead of a transparent one.

I've also tried painting the background pure green (0, 255, 0) and saving as a cur file, in which case the background was still green when I tried using it as a windows cursor.

I've also tried what's been mentioned in a few tutorials, which is selecting the area I want transparent and saving the selection in Photoshop (it then ends up as a new channel). So I selected the cursor and inverted the selection and saved it. The result was a bit odd. Instead of a transparent background, I now get a background that inverts the colours behind it, just like the "Windows inverted" mouse scheme.

So is there any way to accomplish what I'm trying to do?