John, Igor doesn't need to be concerned with handling colour profiles in PTE - the colour profile is independant of PTE and is handled by LUT's within the video card manufacturer's drivers. If you have profiled the graphics card/output pairing, then the system will be colour profiled. FWIW, Very few monitors are capable of displaying anything other than the sRGB colour space, and a lot of them don't actually manage that all that well! Only a few high-end monitors can begin to approach the aRGB colour space - and those cost several thousand $/£'s .