Post processor home before cut

Hi new to the forum and looking for some help. I am building a 4x8 Plasma table with floating head using sheetcam and mach 3. I am running dual drive motors for y axis and would like to have a post processor that homes y to square up then returns to my set zero point to start the cut. Is this possible or reasonable? Should I just use a code snipit instead? Any advice would be appreciated I don’t know much about editing post. Thanks in advance