If you want to edit The Jobs, go to Documents\Blockland\Add-Ons\GameMode_CityRPG (May be something else pretty close to that)\jobs.
If you want to edit the jobs now, you can drag the file to your desktop, than open with notepad.. after that, You'll see information and such
about the jobs. You can edit the jobs, the pay line should look something like this:";;(number);"
If you are finished editing the job, save it... than delete the one in the folder and drag the one from your desktop int the folder..
If you're looking to create a new job, simply drag any job to the desktop... than open with notepad and change the name, pay, cansell(item), (clothes), (service):True/false...
Than when you're finished with that, drag it back into the folder, close it and enter blockland...
That should work (Probably not mac [If doesn't work on Macintosh, try asking a cigaretteintosh fan])