stealth kill - You should just use your normal icq account, your buddies should just show up.
If they don't, the server commands you want to do are (say these in the server window):
"account list", it will tell you the numbers for your accounts.
"account add X ICQ#OFBUDDY NICKNAME", X should be the account number for your icq account as found above (it will be a single digit number), ICQ#OFBUDDY is your buddies icq# and NICKNAME is the nickname you want your buddy to have (no spaces!)
So you'll have something like:
account list
0. ICQ, 13333337 (connected)
add 0 218148529 bob
And then he should be on your contact list

(this isn't really supported on afkim yet, but it should work)