Automating Bluetooth transfers with WinXP SP2

[GoatSucker]

I want to be able to automate file transfers to my phone using the standard Windows XP / SP2 Bluetooth file transfer tools.
I'm currently using the tools by right-clicking on the file in Explorer, and selecting Send To / Bluetooth device, which works fine, except that I want to run this from a command line script.
The 'Send To' shortcut uses the tool fsquirt.exe, which when called directly just opens the wizard. Calling it with the filename i.e. "fsquirt.exe picture.jpg" does the same. The only thing I've been able to do is call it with '-send' or '-receive', which puts it into sending or receiving mode, but I still have to select the file manually.
Has anyone got any ideas on what to pass in to automate the sending of a particular file - it must be posisble because the 'Send To' shortcut does it, but I can't figure out how!
Thanks.