Important!

Before you try to install DVR20004R real time software to PC under Windows2000, you have to install the DSMEM driver at frist.
Open control Panel -> add new hardware -> add new device -> select copy from disk 
find NTMEMSUP in the DSMEM/English path in the Install cd or the installed directory.
atfer that, you can install DVR20004R software in windows2000.
thanks.