Online request form with many fields

Hi, for a customer I should design a complex online request for a
service with a form/module of over 50 controls (texts, texts area, radio
buttons and checkboxes).

I identify two possible solutions: 

	* a web form divided into several pages/steps (but I think it's too
complex) 
 	* download rewritable PDF form/document from site and upload completed
form

What is the best practises in these cases?
Do you have any other suggestions/examples? 

Thanks in advance.
Disimino Vito

-- 

Vito Disimino
SAP - BI&DWH - WEB Consultant
*-----------------------------------*
MOQUI di Disimino Vito
Via S.Pancrazio, 50 - Gessate  - MI
Mobile +39 335.234.707
e-mail : vito.disimino@moqui.it