Campaign Monitor Subscription Integration

I need someone to write a simple PHP or Javascript processor that can send the output of a form containing a name, email and a few custom fields to Campaign Monitor. What makes this complex is that the form will need to go to 2 separate campaign monitor lists under different client accounts, essentially the form needs to be submitted twice. Once account will always be the same, the second will be set based on a provided client / list ID / API. Both lists have the same fields, although they are separate. They capture the same data. I also need simple validation built for the form. This will be 1 email field and checking a name field is filled. This should be a quick project for someone familiar with PHP and/or the Campaign Monitor API. Please let me know if you have any questions, I can explain further or draw diagrams if required. I need this done by Friday 23 November.