Maur has released an excellent pack of thirty-nine crosshairs for UT2004. The pack is easy to install and use. Just unzip to your UT2004 directory and the crosshairs will be available in your weapons configuration menu.
K-Aus XHair pack version7. Now contains 111 xhairs. A few are remakes of default xhairs, some are animated, most are originals. Now contains a set of custom xhairs based off of Tribes([TR] Group)