Combining microCaptcha php script with email address php submission script

I volunteered to put together a small web presence using a WYSIWYG product called WebEasy ver 8. within the site there is an "iframe" which is has within the option to submit an email address for a Newsletter subscription service. This existing submission facility needs to have incorperated into it the freeware 'miniCaptcha' verification system before the submission can continue. These scripts are currently utilising the much used PHP scripting language. I do not have the skills necessary to complete which may, (or may not) be a fairly straight forward conditional 'if' clause ! I do not know whether or not the existing "iframe" should remain in the project as is or an alternative solution be sought as such I'm open to suggestions on this. I have included a test html page created using the WebEasy product. Also the nesessary php scripts that require combining coupled with the microCaptcha freeware system. Many thanks for your time ## Deliverables More of a question really: Currently under Internet Explorer 8 the embedded <iframe> though configured to, does not display a transparant background as it does under Mozilla FireFox 3.6. would it be worthwhile visiting an alternative working solution to the existing <iframe> method. Or can the <iframe> be configured correctly somehow to allow Internet Explorer 7 / 8 to also to display a transparent background as it does with FireFox I can provide a test link to demonstrate the situation if needs be. The microCaptcha zip file includes all the files currently in use with this site (or so I hope!)