Modding The Sims 2
Custom animation for The Sims 2 is still very much in the beta stages (or certainly at the time this article was written). It is already possible to import new animations, just not all bones in those animations are supported currently so there is a limit on the types of animations that can be imported and the quality of those animations. The following links on modthesims2 might be useful for anyone considering making their own animations:
Sim’s Body Animation Converter Thread- unfortunately this is no longer being developed, though support questions will be answered at Mod The Sims forum.
Jaydee’s Animation Tutorial (using Miche’s Sims 2 Animation Converter from above)
Sim Pose - a work in progress for posing the Sims and creating custom animations
MODDING THE SIMS 2
Part of the success of the Sims brand is the ability to mod the game. The modders and custom content creators will sometimes take requests or you could create your own custom content for your movies if you can’t find a certain costume or object you require. Mod The Sims 2 Create Section has a number of tutorials to get you started.
Sims 2 Wiki - The Sims 2 Wiki (created by the folks at MTS2) combines links to fansites, tools, tutorials for modding, building and gameplay.
Sims Homecrafter Plus
A powerful tool, but very easy to use, that lets you create unique walls, floors and ground cover (terrian paints) with a paint program
MTS2 Create Section
Custom content creation tutorials and help.
SimPE is an Editor especially designed for modding The Sims 2. Whatever you want to change in your Game, SimPE can do it. It can perform simple tasks like tweaking your Neighborhoods, as well as more complex Operations, like Creating new Objects. While it is a powerfull Tool, SimPE is absolutely free and largely based on Community work.
DatGen is a tool that allows you to open DBPF archives (DataBase Packed File segments), and edit the files contained within them. The DBPF format was created by Maxis, and has been used in their games since SimCity 4. The format is used in SimCity 4, The Sims Online, and The Sims 2 currently, with possible other games to use it in the future.