1. get this registry cleaner...
http://www.shura.totalcmd.net/download/trashreg.zip
2. install or run it
3. click FILE , then click on FIND KEYS WITH NULL - EMBEDDED NAMES
4. it'll show you the SECUROM - CANNOT DELETE ME key
5. just delete the key
6. DONE!
http://forums.guru3d.com/showthread.php?threadid=203200
Delete the rest:
http://postimg.org/image/hgp28yq8p/full/
Optional:
See if everything is removed with the official Securom removal tool https://support.securom.com/removaltool.html
Although Mission in Asia creates those registry key on launch every time, deleting the keys seems to have fixed a bug where the game would crash on the menu or in game. I managed to complete the game with this method anyway.