I was able to do this, and it seemed to work just fine..
I have no idea what the id parameter is for, so I just set it to something.. here’s what I had..
ID Path: /search/ncf-membership
Request Path: search/ncf-membership
Target Path: catalogsearch/result/?q=NCF+membership
I’m assuming you can put whatever you want for request path, just don’t start with a /
I’m using Magento version 1.2.1