The combine_high_res_exxxtreme_.zip file you have requested: Skins / Npc / Half-Life 2: High Resolution Combine Skins - 28.68mb is not available. Perhaps try browsing all files for the game Half-Life 2 and upload any files you want to share or are missing. This is the only information we could locate:
TaekoHentie has come up with his own high resolution skins pack in the first of a series to be released. This set includes the Combine Police, Prison Guard, Soldier, and Elite Skins.