I searched around, but couldn't find anything so I whipped something together in Python. In order to use the script below, you'll need to have a Python interpreter installed on your system. I recommend installing ActiveState Python which is offered as a free download.
Features include:
This is unsupported beta software. If it works for you, great. If it kills your dog, you're on your own. I just threw it together in an evening after getting double booked again.
Download olex: (Current version is v0.1)
olex.zip
olex.py
If you need this sort of tool, you can freely use the above python command line version (though I retain all copyright and other interests in the code). If you have problems with the code and have patches, send them to jwilkinsatbitlanddotnet.
If you can't use the Python command line version, I'm considering writing another version with a nice graphical interface, complete with an installer.
If you're interested, let me know (jwilkins[at]bitland*net)