I first create a key like so, using translate to lump all titles that start with numerals together):

<xsl:key name="letter-group" match="fmp:ROW" use="translate(substring(fmp:COL[2]/fmp:DATA,1,1),'abcdefghijklmnopqrstuvwxyz1234567890','ABCDEFGHIJKLMNOPQRSTUVWXYZ##########')" />

Then I do a for-each over the keys, sort that subset, and output:

<xsl:for-each select="key('letter-group', substring(fmp:COL[2]/fmp:DATA,1,1))">
    <xsl:sort select="substring(fmp:COL[2]/fmp:DATA,1,1)" />

What I want is this, with the quoted titles sorted into their correct alpha location:

Is there a way to do this in XSL 1.1?