Custom profile field

I’m trying to create custom fields in the admin back end for the user’s profile. I know there is plugins for this, however, I need to make it neat. And with a plugin, it adds a whole new section on the bottom of the “profile edit page” called “Extra Fields”…

I need to add some custom fields under the “About yourself” section… Any ideas?

I’ve started by copying the form code for the about me field in the user-edit.php file and replaced it with the new table names from my database.

<th><label for="interests"><?php _e('Interests'); ?></label></th>
	<td><textarea name="interests" id="interests" rows="5" cols="30"><?php echo $profileuser->interests ?></textarea><br />
	<span class="interests"><?php _e('Share some interests.'); ?></span></td>

I then went into the database>wp_cimy_uef_fields and added the Interests table.

So the new field now shows up in the edit profile page but it doesnt save any information in that field…

Have I missed a step?
Please help. Thank you for your time!