how to use mdwlist multilinelabel?

Hi there,

I'm trying to create a new lyx environment that uses the mdwlist 
package's multilinelabel.  I've gone through the mdwlist 
documentation:

http://www.ctan.org/tex-archive/macros/latex/contrib/mdwtools/mdwlist.dvi

But, I'm not at all sure what to put in my lyx .layout file to make 
this work.  I've got \usepackage{mdwlist} in the preamble, and added 
the following to my .layout file:

# %%% Long_Label Environment
Style Long_Label
  LatexType             Environment
  LatexName             long_label
  Preamble
        \newenvironment{long_label}
                {

        
\begin{basedescript}{\desclabelwidth{1in}\desclabelstyle{\multilinelabel}}
                        \item[]
                }
                {
                        \end{basedescript}
                }
  EndPreamble
End

===================

I can view the dvi file without latex producing any errors, but the 
text looks very different from the examples in the mdwlist.dvi file. 
The problem seems to be that the \item[] in my .layout gives me an 
empty label, and the label plus definition end up where the 
definition should go.

How can I get the label and definitions in the proper place?

TIA,

Kevin Horton