Break on

$path = %path%
$addtopath1 = "stuff"
$addtopath2 = "morestuff"
$addtopath2 = "evenmorestuff"

If InGroup ("group1")
	$path = $path + $addtopath1
	Set "path=$patht"
EndIf
If InGroup ("group2")
	$path = $path + $addtopath2
	Set "path=$path"
EndIf
If InGroup ("group2")
	$path = $path + $addtopath3
	Set "path=$path"
EndIf