I just stumbled upon this question and I know it was asked a really long time ago, but I feel I must still contribute something. I have Hidden Vagenda on vinyl and it's one of my favorite albums. Daniel's part is a contribution to the chorus of "Singing Machine". I don't know what the CD's like, but the insert included in the record is very lenthy and notes that Daniel's verses were "recorded over the phone by Don Goede". If you listen to the end of "Singing Machine", you can definately hear a muffled Daniel singing "you're barely nineteen; you're a singing machine" behind Kimya (and not in sync with her).
I actually don't think he's on "Angels and Seagulls", sorry.
PS: This was my first post.
(Sorry if it wasn't very useful or relevant.)