question regarding good practice for potential integration

[iPenguin02]

Before install vbulletin I was wondering about what's a good rule on setting up SQL for potential integration in the future.

Should I create a separate SQL database for each script? For example vbulletin, RSS feed, and ecommerce have there on SQL database? Or put them in the same database with a prefix to distinguish which is which.

I notice you can set a cookie prefix, should each script have its own prefix or one for all would work?

Thank you in advance for your input.