soap attachment, arrays with attributes and a restrictive java soap server

Hi,

I am trying to talk to a java soap service that is ultra restrictive. 
For example it does not support SOAP-ENC, but only soapenc (which is not 
something the standard actually allows to restrict AFAIK).

At any rate I also need to send soap attachments to the service. It does 
not seem like ext/soap supports this atm and I would rather like to 
spare me the fiddeling with MIME encoding. Also in a C extension I 
cannot easily hack and deploy modifications to match this crazy Java server.

So I decided to go with PEAR::SOAP. I hacked around several issues, but 
I am stuck at the last point. I need to add 2 arrays with attributes 
into my SOAP message.

In this example I am calling the SOAP action "SubmitRequest". As you can 
see the its literal encoding. Using the <content> tag I can have 
multiple files attached. Obviously the entire message needs to be a 
multipart MIME message. I also need to be able to include multiple 
<ding> tags in which I need to be able to set attributes (ideally 
different attributes per tag).

  <SubmitRequest>
       <content filename="image1.gif" 
href="cid:1746ED6DDE448400271DA805A3580400"/>
       <content filename="smil1.smil" 
href="cid:22A00E66CC0BF400408F3B97DBE9E400"/>
       <content filename="text1.txt" 
href="cid:66CD82060A47A8003454807125ED4400"/>
       <ding field="bar">123</ding>
       <ding field="bar">456</ding>
  </SubmitRequest>

Without the need for MIME encoding, I would probably have gone to simply 
keeping a template with the XML and not bothering with any SOAP toolkit. 
But I am sort of scared to spend a lot of time to get MIME encoding 
working myself in that approach.

Can anyone give me some hints how to do this with PEAR::SOAP (or any 
other toolkit/approach)? RTFM pointers welcome :)

regards,
Lukas