The lighttpd in the plugin name is just a label, you can call it anything you want as long as you update the provider in the clip section to match.
To simplify the debugging you may want to eliminate all the php calls and setup direct links - at least for early testing. Just make a blank .php page with direct paths to all the swf files.
To test that the setup is working without the download.php try using this file in your clip url.
http://vod01.netdna.com/vod/demo.flowplayer/Extremists.flv
Once you know its working then start troubleshooting the php script.
Quick example:
<object data="/direct/path/flowplayer/flowplayer-3.2.1.swf" type="application/x-shockwave-flash" width="720" height="480" id="flowplayer">
<param name="movie" value="/direct/path/flowplayer/flowplayer-3.2.1.swf" />
<param name="allowfullscreen" value="true" />
<param name="flashvars" value='config={
"clip":{
"provider":"lighttpd",
"url":"/direct/path/flowplayer/download.php?file=CIM_02_low.flv"
},
"plugins":{
"controls":{
"autoHide":false
},
"lighttpd": {
"url": "/direct/path/flowplayer/flowplayer.pseudostreaming-3.2.1.swf"
}
}
}' /></object>
Which php streaming script are you using?