[support] Filter views on multiple fields

Hi list, I have a content type with multiple fields (name, tel, email, ...). I have created a view to list all nodes of this content type. I able to sort this view by names, tel, ... But now, I want to filter this view by ONE filter textbox and not one for name, an other for tel, ... How can I do that ? I try to use custom text to concatenate all fields but I can't filter my view on custom text field ! I have 2 solutions in mind. Create my own filter or concatenate cck fields into one and filter on it. But I don't know how do that. Do you have some idea ? Or how can I do that ? Thanks in advance for your help.