I found these mods on moddb, and think they should be here:
www.moddb.com/games/hitman-contracts/addons/hitman-contracts-unofficial-patch - Unofficial patch for contracts, works only with english version most likely, read GuyFawkesGaming's comment.
www.moddb.com/games/hitman-contracts/addons/higher-definition-agent-47-retexture - High quality retexture of 47, including uncensored textures for all the characters from the PS3 version (at least for the first five levels).
dege.fw.hu/temp/HitmanContracts_d3d_raindrop_patch.zip - Partially restores openGL effects, if you want you can do it yourself by replacing bytes 53 6A 18 53 50 FF 92 FC 00 00 00
with 90 90 90 90 90 90 90 90 90 90 90
.