"Is there any way to have all the secret uniforms, stadiums and players unlocked without having to complete all the MVP tasks?
Yes, and it's brought to you by the same person who created MVPEdit. You can download it by clicking here. You can download an "unlocked" profile from here. When you've downloaded the file, extract the .sav file and place it in your My DocumentsMVP Baseball 2005 folder, then load it in-game and everything should be unlocked.
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the link in green colored section...everytime i click on it i get a 404 error message. other then that the other links work fine for me.