Comparison those four version of Level-R and Project torque.

Checked the minimum requested Spec of each version as follows;

Actually Japanese and Chinese (simplified/Complecated charactor)　uses 2 bytes letters, on the other hand Germany and English uses 1 bites letters.

Project Torque(North American region/Eleanor/Commercial release)：Windows XP or Vista 32
http://project-torque.aeriagames.com/info/sysreq
(Same when they are on Daiane）

Level-R（Germany, Austria, Swiss/Eleanor/Commercial release）Windows XP or Vista
http://levelr-wiki.gamigo.de/index.php/Systemanforderungen
(Same when they are on Diane)

Level-R（China/Eleneor/finished closed beta 1 and 2, now open beta 1 and soonly commercial release start )：Windows XP or Vista
http://lr.joyzone.com.cn/green_hand_01.html
(Same when they are on Diane)

Both three version above is okay for Vista 32 from when they are Diane, but, only Original Level-R in Japan they officially annouced Vista is not out of warranty.Also they said Windows XP 64 bit is out of warranty. So, problem is not between Windows XP or Vista, but it is 32 bit or 64 bit?

Level-R(Japan：Diane3/Commercial release）： Japanese Ime-Microsoft Windows XP
※XP-Server version,XP 64bit, and Windows Vista is out of warranty.
http://www.level-r.jp/live/about_start02.aspx