table cell issues

Hi,

  I have a table cell like this

<fo:table-cell>
    <fo:block>
        <xsl:value-of select="NOM" />
    </fo:block>
</fo:table-cell>

Current Output
=============

Nomenclature
----------------
Data Data Data Data Data 
Data Data Data Data Data 
Data Data Data Data Data 

Required Output
=============

Nomenclature
----------------
Data Data Data Data Data 
     Data Data Data Data Data 
     Data Data Data Data Data 
column width = 64mm 
(accomodating 27 characters tested with 27 'Z')

How do I provide 5 character width for all
data coming after the first line.  I have no control
over how many line I might end up with.

Is this possible?

Karthikeyan B