Why isn't init PID 1?

[Paul Powell]

Hello,

I have a bootable linux CD that runs a custom init. 
Under most versions of linux init runs as process ID
one.  Under my bootable CD, it runs as process ID 15. 
I need it to run as PID 1 so that I can execute a
kill(-1,15) without killing init.

The boot CD uses and initrd image to load drivers. 
The linuxrc file looks like:

#!/bin/sash

aliasall

echo "Loading aic7xxx module"
insmod /lib/aic7xxx.o
echo "Loading ips module"
insmod /lib/ips.o ips=ioctlsize:512000
echo "Loading sg module"
insmod /lib/sg.o
echo "Loading FAT modules"
insmod /lib/fat.o
insmod /lib/vfat.o

echo "Mounting /proc"
mount -t proc /proc /proc
init
umount /proc

Does it run as PID 15 because I execute insmod and
mount before running init?

Thanks,
Paul

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