1. use CDATA contains the TEXT, like :
<Details>
<![CDATA[ Installation Kit <br/>
This will prepare your computer for use]]>
</Details>
use <br/> to begin with new row.
2. XSLT content:
<td>
<xsl:value-of select="Details" disable-output-escaping="yes" />
</td>
put the disable-output-escaping property to "yes"
That is it. just try it again.