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I've been working with KnowledgeTree for quite some time at work. It's a fantastic program for developers, but a bit cumbersome for end users. I had thought about porting it over to XOOPS, but to do so, you would loose some of the features of KnowledgeTree, such as LDAP Authentication.
If you haven't looked at the Document Management offerings in the Module Repository, you might be a bit suprised. There's modules there that offer a pretty good feature set while being fully compatible with XOOPS.
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.