A real "Rebuilt" would require hacking the original executable (XEX) for the Xbox 360 or the EBOOT for PS3. Key technical hurdles include:
This is where the "rebuilt" part shines. Players wear modern sticks (Bauer, CCM), and the mod includes 4K glove and skate textures. Veteran players like Sidney Crosby look like they do today, not like their 21-year-old rookie selves. nhl 09 rebuilt updated
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