Use the best five in everyday work to customize some words and phrases. The redefine is very troublesome after reloading machine, so you have to make a backup. It stores the path: c: / documents and settings / administrator / application data / microsoft / IME / JPWB / JPWB.EMB backup, override the original file.
If you are disappointed with a folder, you can search the file name directly (jpwb.emb).