File uploading help needed

[eluser]Computerzworld[/eluser]
Hello,
I am having a form in which I require six file input fields. I am using default CI uploader library in order to upload files. But the problem which I am facing is I am not able to use any other names for the file input fields rather than userfile. So, I am able to upload only one file from that form. Please help me. Thanks in advance.