"how does director get the various image sizes when pluged into LR?
and would the plugin convert my finished RAW into jpgs sizes i wanted?
can i add text to each photo in the xml or does the plugin do that automatically from my metadata or similar?"
There are alternatives. As I am using it now, I simply use SSP's LR Export plug-in to upload my raw files as full size JPEGs to SSP Director, and SSP Director then uses ImageMagick on the server to cache a resized JPEG (with a random name) at the size requested by the Flash movie. This cached file will then be served each time a Flash movie calls that image at that size. This means that at any point there will be the full size JPEG plus a number of cached copies of that file - thumbnails of various size and larger size images. If I wanted my main Flash movie to display pictures full screen, Director would just go on creating sizes each time there's a visitor with another screen size. I don't want that, but it would be little effort for me.
That is what I do, mostly. You can also upload the JPEGs at the size you choose, and tell the SSP component not to resize. It's control versus flexibility.
As for the text, the plug-in uses what is in the metadata in LR. If you want it to differ from your image, you could use a virtual copy, change its metadata, and then upload the JPEG from that VC. Alternatively, once the file is uploaded, you can change the text in the Director control panel. The same applies to sorting - initially they are in the order in which they are uploaded, but you can move them around in Director. You can also move them to other SSP galleries and albums, delete them.
With Director, you never really see the XML. You point the SSP component to a URL.
John