Because this is a modified executable (repack), standard fixes sometimes work differently.
The map is unlocked progressively via story missions: Gta San Andreas - Compressed By Tiger Harison -UPD-
The "Compressed By Tiger Harison" version is a "Ripped" or "Low-Spec" repack. It is designed for players with limited hard drive space or older PCs. Because this is a modified executable (repack), standard