Sometimes you may find that getting information through a form isn't a simple one-size-fits-all. You may need to offer a different form depending on the answer to the first, second or third question on that form.
This is something I can offer. The cost of this will depend on it's complexity.
For an example of how I have done this for another customer, please visit their website here and change the dropdown entitled 'Service' (but don't submit the form unless you actually want a towbar!).