Page Layout ⇒ Custom bib style unnumbered

[phoenix]

I would like to use custom-bib to generate a bibliography format that gives me unsrt as well as non-numbered bibliography entries. Which question/option do I choose during interrogation by tex makebst?
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To make in unsrt I select appropriate option after this dialog:
ORDERING OF REFERENCES (if non-author/year and non-alph)
(*) Alphabetical by all authors
(c) Citation order (unsorted, like unsrt.bst)
(d) Year ordered and then by authors
(r) Reverse year ordered and then by authors
Select:
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But for making it unnumbered, I am confused...there don't seem to be any options to suppress numbering with custom bib. An additional complicating factor is that I am using bibtopic to sort my references into multiple bibliography sections. How can I suppress numbering ?

HERE IS THE CODE:

\documentclass[8pt]{article}
\usepackage{vmargin}
\usepackage{multirow}
%%%Multiple Bibliographies%%%
\usepackage{bibtopic}
\usepackage{textcomp}
%\usepackage{amsmath}
\setlength{\parindent}{0pt}%Set paragraph indentation to zero
%\usepackage[T1]{fontenc}
\renewcommand*\familydefault{\sfdefault} %% Only if the base font of the document is to be sans serif
\begin{document}
\nocite{a,b,c,d}

{\bf PEER-REVIEWED JOURNAL ARTICLES} \\
\vspace{-0.1 in}
\nocite{a}
\bibliographystyle{0610custom}
\begin{btSect}{Pubspeer}
\btPrintCited
\end{btSect}

{\bf BOOK CHAPTERS AND REFERENCE TEXTS} \\
\vspace{-0.1 in}
\nocite{b}
\bibliographystyle{0610custom}
\begin{btSect}{PubsBooks}
\btPrintCited
\end{btSect}

{\bf REFEREED CONFERENCE PROCEEDINGS} \\
\vspace{-0.1 in}
\nocite{c}
\bibliographystyle{0610custom}
\begin{btSect}{Pubsconf}
\btPrintCited
\end{btSect}

{\bf OTHER PUBLICATIONS} \\
\vspace{-0.1 in}
\nocite{d}
\bibliographystyle{0610custom}
\begin{btSect}{Pubsother}
\btPrintCited
\end{btSect}

\end{document}