I made an emergency mini compact disc (those wallet-friendly ones) a few month ago and it was instantly useful on a vacation. I was able to access my home PC to backup photos and exchange files between my relative's computer and my home PC with simple tools like WinSCP (winscp.sourceforge.net). There are other cool freebies on the disc that could come in handy in the future. Here are some of my questions relating to emergency discs:
Are you talking about the smaller CD's with two sides lopped off? The kind that some sales people are using for business cards?
I carry around a bunch of similar stuff on a USB drive ... utilities, tools, remote access, etc, plus virus scanners too. I've got a lot of stuff from cygwin, a lot of stuff from the sysinternals guys, a vnc client, a terminal services client, putty and friends, debuggers, etc. It's really great.
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