Hello:
If I’m understanding correctly, you wish your bibliography to be double-spaced or add a space between each reference, right? If so, there is a much simpler way to alter the spacing in your bibliography than editing the style. Please see our Frequently Asked Questions page on how to get your bibliography to double-space or add a space between references here:
http://endnote.com/support/faqs/CWYW/faq40.asp
I hope this helps!