picree, prepare yourself with IfoEdit and calculator. I know it's not an easy application to handle, but you will be able to master your media down to last sector and byte. Please also consult IfoEdit forum.
If IfoEdit looks to difficult you can try IsoBuster. Download a copy (limited freeware) and check out their sector viewer. File rescue and file to ISO converter function can also come handy some day.
Read here how to convert sectors to bytes and vice versa. Thanks to agent009.
BTW, If you can forget about high PIEÂ´s and PIFÂ´s for a while but still wanna check your burn quality, you can just run file- and surface error test in CD/DVD Speed -ScanDisc-...