Adding reCAPTCHA to my UE form

I'm trying to learn how to add reCAPTCHA to a UE form and not having much success. I followed this thread and learned quite a bit, but I'm still not there.

showthread.php?t=17481

I was going to take all the info from this post and try to start with a fresh form. Once I did that I would post the code from my contact form - but now I'm having second thoughts and considering purchasing the Forms Toolkit.

My question is - is it really is as simple as the tutorial shows. I'm really not much of a coder and it sure looks like this is an easy interface to add captcha to my forms.

In reading the tutorial on teh reCAPTCHA website, I had to insert public and private keys into the validation code - but there doesn't seem to be the need for that here - so how does that side of that work? Do I need my keys for this? Or no? Is the captcha from the Forms Toolkit unrelated to www.captcha.net?

I just want to make sure the Forms Toolkit is going to be a simple (as simple as the tutorial indicates), no headache solution to adding recaptcha to my UE form before I spend the $100 :)

Thanks!
Sue