parsing xml with PG 9.2.4 - Mailing list pgsql-general

I hope you can help me. I'm having troubles parsing some data from my psql table, which I need for further manipulation.

So my query:

select program_information.description FROM program_information WHERE id = 8768787;

GIves me:

<?xml version="1.0"?>
<ProgramInformation>
  <BasicDescription>
    <Title type="original">Zla smrt</Title>
    <Synopsis length="short">Pet prijateljev, starih nekaj čez dvajset let, v samotni koči najde Knjigo mrtvih. S posnetka, ki so ga napravili arheologi, izvedo, da je bilo starodavno besedilo odkrito med kandarijskimi ruševinami sumerske civilizacije.</Synopsis>
    <Keyword type="secondary"></Keyword>
    <ParentalGuidance>
      <mpeg7:ParentalRating href="rn:mpeg:MPAAParentalRatingCS:PG">
        <mpeg7:Name>PG</mpeg7:Name>
      </mpeg7:ParentalRating>
    </ParentalGuidance>
    <CreditsList>
      <CreditsItem role="urn:tva:metadata:TVARoleCS:ACTOR">
        <PersonName>
          <mpeg7:GivenName>Bruce</mpeg7:GivenName>
          <mpeg7:FamilyName>Campbell</mpeg7:FamilyName>
        </PersonName>
      </CreditsItem>
      <CreditsItem role="urn:tva:metadata:TVARoleCS:ACTOR">
        <PersonName>
          <mpeg7:GivenName>Ellen</mpeg7:GivenName>
          <mpeg7:FamilyName>Sandweiss</mpeg7:FamilyName>
        </PersonName>
      </CreditsItem>
      <CreditsItem role="urn:tva:metadata:TVARoleCS:ACTOR">
        <PersonName>
          <mpeg7:GivenName>Betsy</mpeg7:GivenName>
          <mpeg7:FamilyName>Baker</mpeg7:FamilyName>
        </PersonName>
      </CreditsItem>
      <CreditsItem role="urn:tva:metadata:TVARoleCS:DIRECTOR">
        <PersonName>
          <mpeg7:GivenName>Sam</mpeg7:GivenName>
          <mpeg7:FamilyName>Raimi</mpeg7:FamilyName>
        </PersonName>
      </CreditsItem>
    </CreditsList>
    <ReleaseInformation>
      <ReleaseDate>
        <Year>1981</Year>
      </ReleaseDate>
    </ReleaseInformation>
  </BasicDescription>
  <AVAttributes>
    <AudioAttributes>
      <NumOfChannels>2</NumOfChannels>
    </AudioAttributes>
  </AVAttributes>
</ProgramInformation>

What I need is parsed data from <CreditsList>, GivenName + FamilyName for all entries. I know it should be doable with xpath but I just can't get it to work :/.

Please help.

Thanks,