RPC with IDS-Script/IDS-plugin

Hi @all,
I am devolping a webfrontend for the IDS based on Adobe Flex which communicates with IDS-Scripts via SOAP (simplified: by clicking a button, a SOAP-message is send and a script will be executed on AIS).

But this way force me to save all infos I need in an XML-doc, which is used and imported into the script. My idea: send all infos I need directly to a script/plugin and process these in IDS without saving in XML.

I know that there is a possibility to make remote procedure calls with Flex.

Is there a chance to let the rpc communicate with scripts (javascript) or java-plugins of IDS?

Thanks for your help!
Chris