I have Systat10. Can anyone comment on is what I am doing correct? (see below)

For doing Fisher's LSD, I would go to Statistics>General Linear model>Estimate model. There I will select the variables (compounds, in my case). What information should I look in the output after this? Why we should "Estimate mode" first and not directly do the LSD ?

Then I will go to Statistics>General Linear model>Pairwise comparison. Here I am asked to enter something in the "Group" field. What is this??

Where exactly in the output can I find if the means are equal or not after selecting Fisher's LSD and clicking OK?

Thanks!