Go to your \NBA LIVE 2005\sgsm\common\xshoes.viv file; you extract a shoefile (often the one you'd like to replace) from there with a program that can handle .viv files (such as EAGraph or bigGUI). Then you open the .fsh shoe file with a program such as FshX or something simular, and import the shoe picture that you got, then save it. After that you import it back into the .viv and it should work just fine.
Does it work for you?
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edit]: Remember to back up your files before changing them
