How I make A50 >> C45?

I have a A50 (soft version 8), a C45 (soft version 31), and a data cable for this phones.
Is possible read the soft from C45 and write in A50? Is necessary correct any data?
How I can change the A50 to C45?

Thanks!

you have to remove an element from the A50, than u can flash it with C45 sw.Don't ask me what to remove.Try to search on Google.