Example code for multiple uploads? (Using PHP 4.0.6)

I'm trying to create a form that supports multiple uploads (of up to 4 files), but does not require each of them. I've tried all the code examples in the PHP documentation, and they don't appear to work with PHP 4.0.6. Basically, I get the file names returned in the arrays, but the array that should contain the name of the temporary file just says 'none'. Things work fine for a single upload. Does anyone have example code for this? Thanks! :) -- Nate Carlson <natecars@real-time.com> | Phone : (952)943-8700 http://www.real-time.com | Fax : (952)943-8500