how to prefix each option for radios?

hi,

i need to create a form that contains radios and i need to prefix each of the radios options with an image. i know i can use forms api to prefix whole radios group but i need to prefix each of the radios in group. for each radio i need something like this:
[radios start here]
[0] [my image prefix] [option text]
[1] [my image prefix] [option text]
[radios end]

but normally when using froms api i can get only this:
[radios start here]
[0] [option text]
[1] [option text]
[radios end]

any ideas how to solve this?