Easiest way I think is with patch...
Code:;W660 SW-R8BB001 ;Замена шрифтов телефона ;Cange system fonts ;(c) Therion ;Original idea by xFoX ;(p) DrummMaster ;v1.0 45BE2C68: 3200300052 3100360042 ;Значения рамера фонта ;E_24I - 3200340049 ;E_24B - 3200340042 ;E_24R - 3200340052 ;E_20I - 3200300049 ;E_20R - 3200300052 ;E_16I - 3100360049 ;E_16B - 3100360042 ;E_14B - 3100340042 ;E_14R - 3100340052 ;E_12B - 3100320042 ;E_12R - 3100320052 ;E_8R - 3800520000