The PowerDVD thing was bugging me, I can't believe they sell that app with no command line or sendmessage functionality. Anyhow I spent a little time tonight with Girder and XL and finally got it to launch a movie properly - it was a pain to figure out and it's not very pretty but it does work.
The reason your DVD's wouldn't open is because PowerDVD opens in "Media" mode by default. .IFO files are not supported in media mode. There doesn't appear to be any way to force "DVD from hard disk mode" in the config or otherwise.
I've uploaded a Girder GML file, it's the 4.0 XP gml from the Girder website with a couple new functions to open the DVD from XL.
http://home.comcast.net/~twhite644/spid ... Xlobby.zipLoad the GML in Girder. Go into Xlobby\F2 and create a new event, select Girder\Send Event String on the right hand side - type "PowerDVDStart,%movies>parameter%" without the quotes. Click Add.
For those that are interested the new commands I added: I set a LUA variable to %movies>parameter% which should point to your .IFO with a variable script. That script calls the OpenDVD command. OpenDVD sends the variable to the clipboard and then sends the keystrokes to PowerDVD to select "DVD from hard disk mode", open the "Open File" dialog, and paste the path in from the clipboard.
good luck,
tsw