HOw to import Patents as PDF to a Endnote-DB automatically ?

I tried following:

I updated the field reserved3 ( where corresponding key refs_id matches to the id in refs ) to my filename like

  internal-pdf://3658655952/y1775.pdf

But that might be not enough. there is still a relationship in refs_ext with reserved2.

If no file is attached there is the value of  1430405627

If I attach a file the value change. WHat meaning has this value?

If I change that value at a reference to something else I get the error in the Deskop IDE of Endnote

The following file could not be opened. This may occur for a number of reasons including, but not limited to: the file is corrupt or the relative link was deleted.

File C:\Users\myuser\mYSQL\3Pat_aus_Scifinder-Saved.Data\PDF\3658655952\y1775.pdf

I have chatted with Endnote support, but they say “they do not support such internal things!”, Ugly!

Can anyone here help me with relevant infos and advices?

Thanks