Just modify your company name:

NUK THEM (Play any mission)
ROB A BANK (Loads of Cash)
TO THE TOP (Cash and missions galore)
COOPER TEAM (Cash, equipment and missions galore)
WATCH THE CLOCK (time is flying)

Do you need to accept the name for this to work? I mean do you need to leave the edit company menu in order for it to take effect?

I've tried several times and the cheats aren't working. I'm wondering what I'm doing wrong.