Looking for Captcha field for webform I have tried: Mollom module and Captcha module to put a captcha in my webforms.

Had no problem at all -they work for non-admin users- but they don't fit all my needs because I need an actual field I can include in a form in a position I want (e.g. my webform has two columns and want to place that field inside of one of the columns, instead of adding it at the end). E.g.

++++++++++++++++++++++++++++++++++++++++++++++++++++
+ First name              + Car Model              +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Last Name               + Car Color              +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ City                    + I need captcha         +
+++++++++++++++++++++++++++ in this exact          +
+ Phone                   + line / cell            +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ T&amp;C / ToU               +          Send          +
++++++++++++++++++++++++++++++++++++++++++++++++++++


But with those modules I get the captcha field as displayed:

++++++++++++++++++++++++++++++++++++++++++++++++++++
+ First name              + Car Model              +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Last Name               + Car Color              +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ City                    +          Send          +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Phone                   +                        +
+++++++++++++++++++++++++++                        +
+ T&amp;C / ToU               +                        +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+ I'm having the                                   +
+ captcha component at                             +
+ the end of the form                              +
++++++++++++++++++++++++++++++++++++++++++++++++++++


(which does not help since the "send" button is above the field and the field is not inside of any column).

What module could I install so I can create an explicit [web]form captcha field and place it where I want in the form layout?
Maybe think about alternatives? We use BOTCHA module everywhere these days to combat spam submissions. Works much better than any captcha and is far less intrusive for real people. Just a thought.