I am having the same issue.
The game simply will not start up under single player. It starts and runs fine under C4lan.exe but not c4.exe.
Here are my system specs:
Gigabyte k8nsnxp s754 nForce3 250GB
AMD A64 3200+
eVGA 6800GT
SB Audigy 2 ZS
I have reinstalled, uninstalled, reinstalled, rebooted, updated, disabled firewall/antivirus, tried cracks, different update downloads etc. The exe shows as running under CTRL+ALT+DEL, but nothing happens. Not even a whisper from the DVD-ROM drive (I only have one). I have tried installing in my normal game folder, my OS drive, and tried running the program in win98 compatibility mode. I have scoured the net for fixes and this forum has the only people who have the same issue as I do with the game.
This has me pretty upset and I dislike Novalogic even more for their shoddy websites and lackluster support.
Can anyone help? Thanks!