Hi Peter,
Do as follows:
1) save the binary content you want to send to a file
2) create an HTTP Request Step in a TestCase with POST and the correct URL
3) add the file as an attachment to the request (in the attachments tab at the bottom left of the request window)
4) make sure that the "Media Type" field in the request window has the same value as the "Content type" column for your attachment (for example application/octet-stream)
5) submit the request!
This should result in soapUI sending the attached file as the content of the request.
Does this work ok?
regards,
/Ole
SmartBear Software