TD00..TD02TS00..TS02RPC1 means removing the region code or region-switching lock from the drive. Normally the DVD drive is set to your region (1..5) so that you can only play DVDs from your region. You can change this region 5 times with the last change being permanently.
RPC1 means removing this limit. Also you can sometimes set your drive to region code 0 which will allow you to play DVDs of any region.
You can enable RPC1 by using MCSE.
HKEY_LOCAL_MACHINE\Software\Microsoft. There you'll find a key with strange characters (something like ';t-z%) which contains a single REG_QWORD value. Delete the whole key and you'll be back at 5 changes left.