Over the past few months, several potential clients have asked me to configure and install open-source programs. That's not unusual in and of itself. I have been consulting for 15 years, and always enjoy receiving calls from people with problems that I may be able to solve. But in each of these recent cases, the callers assumed that the majority of my time would be spent installing their programs. They neglected to take into consideration the time and cost associated with connecting their new software with their existing, legacy systems.