1) I made an empty /etc/init.d/dhcp.sh, and it works like a charm, so thanks for the quick replies.
2) This is however still bothering me. I've placed the script in /opt/bootlocal.sh and have removed the "&" after the line in tc-config, but the script refuses to run.
I tried the following command, just to see whether the script could run manually on TC/MC or not, and it seems like a no-go, but why?
$ sudo su
# cd /opt
# ./bootlocal.sh
sh: ./bootlocal.sh: not found
Then I used the ls-command to verify, that the script actually existed in /opt, and it did.
I've done chmod u+x before I moved the script to /opt from my native system (Ubuntu)
Current /opt/bootlocal.sh:
#!/bin/bash
echo helloworld