Venryx, I would assume that as this is the open-source version of Wikidot, any modules included in the source code you are free to edit.
Depending on what the licence requirements are (this is a quick post, so I do not have time to check this myself) … you may be required to re-submit any code changes that you make back to the community.
If you are willing to switch to the Wikidot.com hosted version, you have a very powerful ListPages module at your disposal. This could be a viable alternative for you?
~ Leiger - Wikidot Community Admin - Volunteer
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