This is what worked for me. Installed the game. (this is important
)
1. Update/patch to version 1.1 (splinter_cell_double_agent_1_00_to_1_01)
26MB.
2. Mount the NS-SCDAMI.MDS Maxi-Image in DAEMON Tools v4.06 (SPTD v1.37)
3. Activate YASU
4. Execute the SCDALauncher from ?:\Ubisoft\Tom Clancy's Splinter Cell Double Agent
5. Play the Game!