I do not use CHIRP for my FT-60 but have down loaded it to chirp in case I would like to at some later date.? Chirp does support BANKS for the FT-60, and selecting frequencies to banks is done in much the same way as explaned by WN6WJN for his RT systems software, or for the FTB60 software from G4HFQ software (http://www.g4hfq.co.uk/)? that I use.? Just look at the left side of the chirp screen.? You should see 3 "tabs" MEMORY. BANKS, & SETTINGS.? Just select the banks tab, then your frequencies can be selected to banks by checking boxes on the displayed screen.
Steve
KD8PRS