CPR X NON ADHERENCE TO ATC CLRNC READBACK AND FLEW WRONG HDG UNAUTHORIZED AIRSPACE ENTRY. PLTDEV.

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I WAS WORKING THE SATELLITE HDOF POS AT ATLANTA APCH CTL. CPR X WAS RELEASED OFF FULTON COUNTY ARPT ON A SBOUND IFR FLT PLAN. STANDARD PROC IS TO BRING SUCH TFC OVERHEAD ATLANTA HARTSFIELD IN A 'CORRIDOR' AT 6000 FT. THE TFC DEPARTED RWY 8 ON A HDG OF 030. THE DEP CTLR ISSUED A CLB TO 6000 AND A TURN TO HDG OF 160; WHICH WOULD HAVE PUT THE ACFT IN THE CORRIDOR. AS HDOF MAN; I INITIATED A HDOF TO THE S SATELLITE CTLR; WHO SUBSEQUENTLY HANDED IT OFF TO THE HARTSFIELD S DEP CTLR. THE PROBLEM OCCURRED WHEN THE PLT TURNED TO A HDG OF 260. THE ATTN OF BOTH THE RADAR CTLR AND MYSELF WAS DIVERTED BY ANOTHER SITUATION AND BEFORE WE NOTICED THE HDG OF THE CPR ACFT; HE WAS IN AN AREA WHERE NUMEROUS ACFT ARE BEING FED TO THE HARTSFIELD FINAL; ALSO AT 6000 FT. LUCKILY THE S DEP CTLR HAD POINTED THE TFC OUT TO THE ARR SECTORS AND SEPARATION WAS NOT COMPROMISED. THE SITUATION OCCURRED DUE TO A COM MIXUP; SPECIFICALLY A MISSED READBACK; BECAUSE THERE WERE OTHER MATTERS TO ATTEND TO AND THE CTLR KNEW A 160 HDG WOULD PUT THE CPR ACFT WHERE HE WANTED HIM AND HE WOULDN'T HAVE TO WORRY ABOUT IT. IN HIS MIND THAT ACFT WAS TAKEN CARE OF AND NOT A PROBLEM FOR ANYONE. HOWEVER; WITHOUT THE ACTION OF THE S DEP CTLR IT COULD HAVE DEVELOPED INTO A VERY DANGEROUS SITUATION.