STALKER Oblivion Lost

I am having a problem trying to install the mod for Shadow of chernobyl. I try to extract the gamedata into the stalker folder but I get all these different error messages. I will give you some examples.

! C:\Users\Andrew\Downloads\ol22_for_10005.7z: CRC failed in gamedata\textures\wpn\wpn_ak74_bump.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_aksu.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_aksu_bump#.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_aksu_bump.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_ammo.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_beretta.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnbizonwpn_bizon_mag.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnbizonwpn_bizon_mag_bump#.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnbizonwpn_bizon_mag_bump.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnbizonwpn_bizon_rec.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnbizonwpn_bizon_rec_bump#.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnbizonwpn_bizon_rec_bump.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_bm-16.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_cartridge1_19_super.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_colt.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_crosshair_4-Dot-N.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_crosshair_bino.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_crosshair_fn2000_p.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_desert_eagle.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_fn2000.dds. The file is corrupt
! C:UsersAndrewDownloadsol22_for_10005.7z: CRC failed in gamedatatextureswpnwpn_fn2000_bump#.dds. The file is corrupt

If someone could confirm that my stalker game is corrupt or could tell me how to fix it that would be great.