The 4aces_ui_and_maps.7z file you have requested: Clear Sky / Mods / Singleplayer / 4Aces UI and Map Upgrades - 28.51mb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
This is a texture upgrade for the User Interface and Maps in Clear Sky.The Maps are from LuxZg's 1.2 pack.