how to fix the GetHostUUIDString: unable to determine UUID for host. Error: 35 in snow leopard

You need to go to /Library/Preferences/SystemConfiguration and edit NetworkInterfaces.plist and add a new dict with the IEEE80211 config..
<dict>
<key>BSD Name</key>
<string>en3</string>
<key>IOBuiltin</key>
<false/>
<key>IOInterfaceType</key>
<integer>6</integer>
<key>IOInterfaceUnit</key>
<integer>3</integer>
<key>IOLocation</key>
<string></string>
<key>IOMACAddress</key>
<data>
ABbPoF5V
</data>
<key>IOPathMatch</key>
<string>IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/P0P3@1C,2/
IOPCI2PCIBridge/pci14e4,4311@0/AirPort_Brcm43xx/IO80211Interface</string>
<key>SCNetworkInterfaceType</key>
<string>IEEE80211</string>
</dict>
Save and reboot…