after more research, and more than a little trial and error I found my own answer.
for those of you who are new to the cs1000 and might want to know yourself.
it is load 20
type (type of phone i.e. 500 or 3902)
tn enter tn
item rnpg 22 (where 22 represents the pickup group number assigned.)
item (the system is looking for the next item to be changed, so just hit enter