Multiple-combined instance mode

[ivan]

I use a proggie called Unlocker quite a bit and find it useful very frequently. It's integrated into context and often I have a list of files to check so I select them, right-click on one of those and click "Unlocker". It checks the files, if no handles are found then it will display a message saying so and if there are handles found then it will display a list of the files affected and a bunch of other info.

Now I have a "Open With" UDC assigned to Unlocker to check the files. The issue is that this contex-based command seems to go through neither single nor multiple instance mode. I tried single instance and it found no handles, I tried multiple instance and it parse each file and displayed each info window for each file, which is not satisfactory if the list of files is long.

What Unlocker seems to do with that context command is to check for handles and polls the results together into one window. This leads me to believe that it operates on some sort of multiple instance (because of numerous files) and combined (because of polling of results) basis. I had a look at command-line options for it but not much help.

Would it be possible to determine what sort of command is being applied to this list of files and add an appropriate mode?