Companies House XML Gateway Integration

I have a trial user name and password from the UK's Companies House XML gateway. All I need is a simple php class on very urgent basis that will httppost an xml request to the gateway and get the xml response. I think my problem is with the authentication element, but I may be wrong. The specification is available at [login to view URL] You can also check the attached document too. My budget for this project is small between $30-$100 because I am also a technical guy and already know this is not a time taking job as for any experience professional it will not take more than 1-2 days, So please submit your competitive bids with your demo as I will award the job to right candidate on first come first serve basis as my credentials for accessing companies house xml gateway is Presenter id 66662372000 Authentication id E94CNPY2PX6 Package Ref 0011