IC-F121S/221S (8 channels) are programmed with CS-F100S Windows software...
<http://www.actioncommunications.com/merchant/merchant.mvc?Screen=PROD&Store_Code=ACI&Product_Code=CSF100S&Category_Code=Programming%2FSoftware%2FAlignment%2C+Mobile>
IC-F121/221 (128 channels) are programmed with CS-F100 Windows software...
The cheapest place I have seen the software is here for $56
<http://www.icom-usa.com/accessories.htm>
