Newbie new to editing post/mastercamx5

Im wanting to do a few things to my post if anyone could help?

would like my safty line to be like
G80G90G49G40G17G0Z0

Call up the next tool?

delete i's and j's if they display .0

g98 instead of 99 on drilling cycles

Delete X0 at the end of programs and maybe use g53 for y0 home?

remove g90 out of my g54 line

add m8 on g43



Take it easy im new at this..