db = $CityRPG::jobs::datablock;
That's what my copy of cityRPG uses, but I don't use it anymore so I can't really say if that will work. There's been so many re releases and edits of it, where people change the name of all the datablocks so it looks like they made it (I believe rykuta did this and brian smith as well a long time ago), then released it. People attempted to fix it and release it, so there are tons of versions in circulation.