Creating 8 bit 256 highlight whit alpha help !

Hi guys i have finisch all my gauges
now i need to made some glass reflect on my gauges !
to made it more cool !
but i have a litle trouble ?
my question is what programme i need for making my 256 8 bit bmp file whit alpha ?
have try dxtbmp programme for making my alpha but its not working on a 8 bit 256 color texture
have try bmp 2000 and image tool programme but none was able to make a 256 8 bit image whit
now i need to made some glass reflect on my gauges !
to made it more cool !
but i have a litle trouble ?
my question is what programme i need for making my 256 8 bit bmp file whit alpha ?
have try dxtbmp programme for making my alpha but its not working on a 8 bit 256 color texture
have try bmp 2000 and image tool programme but none was able to make a 256 8 bit image whit