There's a hack for a certain fairly well known piece of enterprise software that allows you to install legacy tools on a fresh installation, rather then have to go back and install an obsolete version and run multiple upgrades when building out replacement servers. These tools are required if you want to maintain legacy code. There are also major compatability issues to address. This saved me days of frustration...
Sworn to secrecy by the consultant (so not naming the software!). Apparently there's a lot of internal politics involved. Weird. But yay for the devs who slipped this one in.
EDIT: Not fascinating to everyone but an interesting example of official corporate stupidity. Or, possibly, attempting to make sure that customers pay big $$$ for consultants instead of doing the work themselves.