Two reference lists in one document

Hi there - I was wondering if anybody could help out with this. I’ve had no luck so far searching the web for instructions on how to do this! I am running Endnote X3 and Word 2007.

So I am checking references in a book chapter for my supervisor. The style we are using has to be New England Journal of Medicine style. However, to make things difficult they have called for two different reference lists within the one book chapter.

The first - the Top 25 list contains the most important references, and should be superscripted in the document (which is what Endnote does automatically on word).

The second reference list  - the Online References, however, should go from 1-110, but should be in brackets (e.g., (11).

The numbers in the first reference list and second reference list do not correspond to the same references.

Does anybody know how to do this, or point me in the right direction?