I've attached my (untested) do crosshair. To use it, you'll have to mess around with the Weapon_* files in your NS sprites folder. I'll show you how to do it with bite, and let you do the rest.
Step 2: Change it to use a crosshair. Modify it to: <!--c1--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><b>CODE</b> </td></tr><tr><td id='CODE'><!--ec1-->8 weapon 320 320w 0 60 80 20 weapon_s 320 320w-s 0 60 80 20 ammo 320 640hud7 96 96 24 24 crosshair 320 xhairdot 0 0 64 64 weapon 640 640aw1 0 45 170 45 weapon_s 640 640aw1-s 0 45 170 45 ammo 640 640hud7 96 96 24 24 crosshair 640 xhairdot 0 0 64 64 <!--c2--></td></tr></table><div class='postcolor'><!--ec2-->
Step 3: Do the same for other weapons in question.
I hope that works. <!--emo&:)--><img src='http://www.unknownworlds.com/forums/html//emoticons/smile.gif' border='0' style='vertical-align:middle' alt='smile.gif' /><!--endemo-->
Comments
Step 1: Open weapon_bitegun
It should read like this: <!--c1--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><b>CODE</b> </td></tr><tr><td id='CODE'><!--ec1-->6
weapon 320 320w 0 60 80 20
weapon_s 320 320w-s 0 60 80 20
ammo 320 640hud7 96 96 24 24
weapon 640 640aw1 0 45 170 45
weapon_s 640 640aw1-s 0 45 170 45
ammo 640 640hud7 96 96 24 24
<!--c2--></td></tr></table><div class='postcolor'><!--ec2-->
Step 2: Change it to use a crosshair. Modify it to:
<!--c1--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><b>CODE</b> </td></tr><tr><td id='CODE'><!--ec1-->8
weapon 320 320w 0 60 80 20
weapon_s 320 320w-s 0 60 80 20
ammo 320 640hud7 96 96 24 24
crosshair 320 xhairdot 0 0 64 64
weapon 640 640aw1 0 45 170 45
weapon_s 640 640aw1-s 0 45 170 45
ammo 640 640hud7 96 96 24 24
crosshair 640 xhairdot 0 0 64 64
<!--c2--></td></tr></table><div class='postcolor'><!--ec2-->
Step 3: Do the same for other weapons in question.
I hope that works. <!--emo&:)--><img src='http://www.unknownworlds.com/forums/html//emoticons/smile.gif' border='0' style='vertical-align:middle' alt='smile.gif' /><!--endemo-->
You'll find it in <a href='http://www.unknownworlds.com/forums/index.php?showtopic=51813&hl=' target='_blank'>this thread</a>.