parsing xml with PG 9.2.4

[Mario Vlahovic]

Hello Developers,
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,