Okay. Thanks.
As I understand it: you have a current InfoPath form that you want to convert into a Word form. And you want to be able to send the Word form to others as an email attachment.
Unfortunately, there is no InfoPath-to-Word conversion tool that I am aware of. This means that you will need to manually create the Word form from scratch, ensuring that all required features and functionality match what is currently in your InfoPath form. Other than knowing that Word allows the creation of forms, or at least lets you have specific editable fields, my knowledge of Word forms ends here. As to whether there is any kind of an attachment control available in Word forms, I do not know.
Someone else might be able to help out here. But I would highly recommend that you hook up with the Microsoft public newsgroup for Word or a Word-specific forum and ask your question there, as you are more likely to get a better answer than you would here.