The most common way to install a kernel is to flash it in a custom recovery. There are a couple of notable exceptions, but otherwise the process is pretty straightforward. However, some users may fall to a common malady known as laziness. Now, HTC One X users have an easy way of switching kernels.
XDA Senior Member maseo has created an installer for Windows PCs that will install a kernel from the computer instead of from recovery. While it unfortunately means that you must be connected to a PC, this makes switching kernels even easier than it was before by automating the entire process. The installer will push the kernel to your One X, reboot, and install the kernel.
It is pretty easy to use. Maseo has created a Dropbox folder with all the currently supported kernels. Users simply sync with their own Dropbox account or download all the supported kernels in a rar file. From there, it’s a matter of running the installer, selecting the kernel and watching as the kernel gets installed. This saves a lot of time as all the kernels are readily available whenever they’re needed. Unfortunately, the kernel installer is only supported for the Android Revolution HD ROM, and the app is only for Windows. However, maseo says:
For now it only works on Windows, with modified kernels for ARHD 7.x. Other roms and OS’s could be added if there’s enough interest.
So if you want this on another ROM or OS, don’t be afraid to ask. For further information, check out the original thread.