Install rom without KNOX warranty void from 0x0 to 0x1? topic

I would like to install custom rom on my i9505. It has stock system now and 0x0 knox. Is is possible to install this rom: http://forum.xda-developers.com/show....php?t=2544474 without voiding KNOX warranty (0x1). If the answer is yes, how to do that and how to reset everything (rom, kerrnel, flash counter, ...) back to stock after?