I have a 898xlt, but in your question first you mention "talkgroups", then you mention freqys in the "chain-search"...OK, in the chain -searchs (10) when in the chain-search press"HOLD", then press on the key pad one of the bank "letters" (A-J) and it will start "blinking", then you can input a new search in that letter of the chain, ex: 150.00 -Enter, then 151.00-Enter, then press search again....Now, if you asking about "Search-TRUNKING you have to stop the scanner during its search of "talkgroups", press manual then you will be in the sub-trunking banks, go to a talkgroup and press"0"-Enter and it will "CLEAR" that talkgroup...It did sound like you want my first procedure....