[davidw]

The custom thread fields look similar to profile fields. There is a world of difference between this hack and those hacks (forms included) - like comparing apples to oranges. If you need something for custom fields, this would probably not be the hack for you then. It doesn't work like that. However, essentially, you could probably create a form or forms and place them in a custom template if you chose to - then they would work together.

How this works:
Say for example you want to place some content on your site - an image, an iframe, a whole block of code. Normally, and especially if you have multiple styles (2-20 or more), just going in and editing each one's content to change something can become cumbersome. This hack allows you to put all your code in one spot (the template) and then let you call the template wherever. If you have 10 styles, your edit changes 10 styles at once (provided you have the custom template called in each of those styles). This is one example. This is how I am doing it (I have 5-6 styles.