Gday Ben
A Polar two star doesnt use Sigma Octans
so dont worry about trying to find it
There are many ways to align a Meade LX200GPS
( and more ways to cheat )
If you "know" you are well polar aligned
( ie you have drift aligned ), then just do a polar one star align
When it says centre Sig Oct, just hit enter and then centre the second star
If you do do a polar two star, you MUST manually centre the first star by declutching ( not use the HBx ), or she'll turn to custard.
Andrew