On http://www.os2.jp there is a post about this update to NSIME. I don't use Chinese or Japanese so I am not 100% sure, but it appears from translation using http://babelfish.yahoo.com that this is to insert kana Chinese/Japanese characters into an editor. You can read the post http://www.os2.jp/modules/news/article.php?storyid=2927 (It is in Japanese).
The web site for this utility is http://hp.vector.co.jp/authors/VA023499/soft/nsime/nsime.html (Also in Japanese).
I know nothing about this application. I am just passing on the news for anyone that might be interested in this feature.
Translation of change log:
ver0.4 (2009/04/02)
* “Validity of MS-IME interchangeable IME on/off operation”/it tried to be able to select invalidity.
* “After on/off operating, validity of supervision/it tried IME” to be able to select invalidity.
* Adding the performance which indication/non indicates the IME control button in automatically.
From: Mark Dodel
Source: OS2VOICE