Script to read CSV file and update CRM using ZenDesk API

I require a script that will be run manually, it will read a CSV file which contains users external-id's. Using the external-id's it will lookup users indivudally in our CRM to find their internal-id. Once you get the internal-id, it used to update the user's profile. ## Deliverables I require a script that will be run manually, it will read a CSV file consisting of some ID #'s 110000,10001, 11002, 11003 etc. it will then query our CRM .[login to view URL] Which then returns the following XML: <records type="array" count="1"> <record> <created-at type="datetime">2011-06-22T09:25:02-07:00</created-at> <details/> <external-id>1017069563</external-id> <id type="integer">65767968</id> <is-active type="boolean">true</is-active> <last-login type="datetime">2012-01-25T14:04:12-08:00</last-login> <locale-id type="integer">1</locale-id> <name></name> <notes></notes> <openid-url nil="true"/> <organization-id type="integer">20479158</organization-id> <phone/> <restriction-id type="integer">4</restriction-id> <roles type="integer"></roles> <time-zone>Tijuana</time-zone> <updated-at type="datetime">2012-01-25T14:04:25-08:00</updated-at> <current-tags/> <email>carlos@[login to view URL]</email> <is-verified type="boolean">true</is-verified> <photo-url> http://.[login to view URL] </photo-url> <uses-12-hour-clock type="boolean">true</uses-12-hour-clock> <custom-role-id nil="true"/> <groups type="array"/> </record> </records> It should then grab this element: <id type="integer">65767968</id> Then uses the ZenDesk API's PUT to update the following field: <organization-id type="integer">20479158</organization-id> <[login to view URL]>