Well, the Request Stream isn't a file location either. Worse, you can't
write to it. It's like an email that you receive. You can't write a reply to
an email by opening the email and writing into it. You have to send an email
reply. Request is one way. So is Response (the other way). If these files
are in a SharePoint document library, I suggest you use the SharePoint
services API to replace them. Otherwise, you'll be in worse trouble than you
are now, because you'll break your SharePoint Services.

Signature
HTH,
Kevin Spencer
Microsoft MVP
.Net Developer
Ambiguity has a certain quality to it.
>I can try but I was testing this because I'm planning to access xml files
> stored in a sharepoint document library and the link to those isn't a file
[quoted text clipped - 63 lines]
>> > readStream.Write(byteArray, 0, postData.Length)
>> > readStream.Close()