OFB or later recommended. This will conflict with a hack affecting dish-washing autonomy.
Research Fix - One Rate of Fun Drain
Obviously this only works on college lots. Visiting young adults will not initiate research. They can however join your research or be asked to join as usual. There are more checks before picking a book from the shelf so that they don't begin research if their motives are likely to run into trouble during research. With any young adult doing research, if their Fun motive drops to 25% or lower, or their mood drops to 50% (right between green and red) they will put their book back.
In addition, bigger groups will get more points towards their grade than they did before.
Research Fix - Bigger Group Less Fun Drain
Same as above, however with the addition that larger groups won't lose Fun motive quite as quickly as smaller groups.
This is an older hack which has only been tested for Uni. It may conflict with the Research hacks above.
Do not use more than one of the skill gain hacks at a time. Again, these hacks may now be out of date as they were created back when Uni was out.
- Strongly affects higher skill levels
Hack 2 - Tends to double skill time for later levels
Hack 3 - Doubles time for later levels, triples time for last level
Hack 4 - High levels not affected as much as lower levels
Hack 5 - Favours mid-range levels
Hack 6 - Favours low levels, higher levels take much longer
Extract the package files to your My Documents\EA Games\The Sims 2\Downloads\ folder, or a subfolder if preferred.