Good desciption of vbulletin operation

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I tried for an hour to find out where vbulletin stores the banned email accounts, but did not find it either in the db or any flat or php files. Guess I'll get out the old grep man page and try to figure out how to use the command to search through the files.

I nice description of how vbulletin works would be great to educate people wishing to make modifications on how it does things and where it stores information. Sounds like a heck of a lot of work to put together though. If anybody knows of a good description of the whole system, please let me know.