you can install sysgfx patch and use a multitude of different batteries and/or signal icons. you can also hardcode them into swf standby made with flashlite 1.1 or if you got to 4shared you can search for an app called SWFlayer, its discontinued but it has about 10 different battery options and somee signals too, it is a
monkey proof app that lets you make good flash desktyops in 5 seconds.
and there is elfs that alter battery, elf that clears the staus area, patches to chage sig/batt colour yada yada yada, check about

there must be stuff out there for you, The search here is more random rnd funtion so i wont point you their as typing "flash" into there would prolly crash your pc

BUT if you go to the tutorials section its guaranteed you will find summin you can sort out.
