jUploadr is written by Java, you need to install JDK(or JRE) before using it.
But the win32 version of jUploadr use a batch file to start jUploadr, the batch file require REG.exe (which is included in WinXP by default no in Win2000).
You can get reg.exe from the following links:
http://www.petri.co.il/download_free_reskit_tools.htm
In my environment (Win2000), there is still some problem in the batch file to start jUploadr. Thus, I have packaged the jUplaodr using InstallAnywhere. The installer will help you to install jUploadr and help you execute jUploadr more easily. (no more DOS command window)
jUploadr_1.1.1_setup.exe (Without JVM)
(You still need to install JDK first)