WARNING: If your device is not listed in post #1 of this thread, and it does NOT use a 'YAFFS'-based filesystem (e.g. usually only low-end devices use YAFFS), do not attempt to flash a ROM that you built with this kitchen. Instead, you must do the following if your device is NOT listed:
Create a file under the kitchen's /tools/edify_defs folder, with the name being the same as the value of ro.product.device (found in your device's /system/build.prop file).
If the stock ROM images for your device contain the recovery.img file, extract its files from the kitchen menu: Advanced --> Tools for boot image --> Extract from boot.img/recovery.img in any folder. Then, open up its ramdisk folder, and look for /system/etc/recovery.fstab or /etc/recovery.fstab or similar FSTAB file location. Open this file to find the mount points.
See the template file in the edify_defs folder to see how to set the mount points inside the file you created. Look at the other files in that folder for examples on how to do it.
NOTE: This method does not guarantee your device will work with your custom ROM, however. Some devices may require more steps than just the edify_defs file, but the procedure is outside the scope of this FAQ. Ask around in the XDA sub-forum for your device if you need further help.