I would use a simple script with REST API call that would create new models by type, specifying devices by IP and their names. It's a straight forward script that calls curl
URL="$ocprotocol://$ocserver:$ocport/spectrum/restful/model?landscapeid=${LandscapeID}&mtypeid=0x10290&attr=0x1006e&val=${urlencode_pingablename}&attr=0x12d7f&val=${IP_ADDRESS}&parentmh=${parent_container_mh}$&relationid=0x00010002"
curl -k -s --netrc-file $ochash -H "Content-Type: application/xml" -X POST "$URL"