Tweaking ROMs here on XDA is comparable to baseball in the United States—it is our pastime. While the major accomplishments include rooting devices, cracking bootloaders, and making ROMs, a great deal of us apply tweaks as well in one form or another. There is now a way to make it easier on everyone.
XDA Senior Member Androguide.fr has produced a mod that will install a very large number of tweaks to virtually any ROM on any device. It could be compared with other applications that do this, such as ROM Toolbox by JRummy Apps Inc. Except instead of doing it via an application, users flash the mod and choose their tweaks using the now-popular AROMA Installer.
To use, download the mod and flash it in custom recovery after a proper cache and Dalvik wipe. From there, you can install from a variety of options to tweak your phone. The list of all the possible tweaks is ridiculously long but it includes init.d scripts, build.prop tweaks, the ability to enable or disable functionality like hardware acceleration, adding applications, adding features. And if you’re running the right ROMs, there are even some themes available. If you’re a big fan of tweaks and mods, this is definitely something worth checking out.
You can find more details in the original thread.