Common sense Tips like this are very useful and hard to come by.
I don't have the time to start a collection, but if you know of a collection like this I would like to know about it.
This knoppix/form is the closest thing I can find to a tips collection, and I do use it often.
Searching through it with Google is VERY time consuming but it is all I know.

I suppose I should post this to the tips and tricks forum. What do you think?
I don't know how to use your code to test for multiple lock files though. - Mike