Long form to fit in 4 columns

Hi:

I'm designing a Website cost calculator with Javascript using a form that is going to be very long.

Now the design in my website is arranged in 4 columns, made like this: 4 mod_article in the page 25% wide each with their content elements set at 100% width.

Now the questionnaire for the website cost calculator is in one form, because I may want people to submit it, so I can't have 4 forms so that each one fits in each of the articles.

Here's the link to the blog article so you get a better idea of what I want to do: http://assembly21.com/how-much-does-a-website-cost.html. The rest of the website uses that 4 column design.

Is there any way that I can arrange the form along the 4 columns/mod_articles?

Thanks in advance.