read XML File

Hello,

I'm a newbie in Applescript and I would like to store my setting (for 
my automator workflow) in a xml File with this strukture:

<?xml version="1.0" encoding="utf-8"?>
<networks>

    <net ip="192.168.20.">
        <interfaces>
            <iface name="en0"/>
            <iface name="en1"/>
        </interfaces>
        <serverpath>
            <unc url="smb://xxx/home"/>
            <unc url="smb://xxx/graphic"/>
            <unc url="smb://xxx/mp3"/>
            <unc url="smb://xxx/software"/>
            <unc url="smb://xxx/lehre"/>
        </serverpath>
    </net>

    <net ip="139.174.">
        <interfaces>
            <iface name="en0"/>
            <iface name="en1"/>
        </interfaces>
        <serverpath>
            <unc url="smb://nas1/home"/>
            <unc url="smb://lizzi/msdnaa"/>
            <unc url="smb://nas2/public"/>
            <unc url="smb://nas1/temp"/>
        </serverpath>
    </net>
</networks>

How I can read a xml file with AppleScript? I need the ip attribute in 
one variable, the iface and unx nodes in a list. Can I create "objects" 
like list of networks-objects and of the network-objects I can get the 
attributes like object-properties?

Thanks for help

Phil