Custom crosshairs:
You can use the normal method in hudlayout - xhairs.res (old fashioned)
I much prefer vtf crosshairs.
Here's DOLPHINRIDER's guide on how to use them.
I made some custom ones located in materials/vgui/replays/thumbnails/xhairshadow
or
materials/vgui/replays/thumbnails/xhairflat
http://i.imgur.com/QzNRRPH.png
p.s. you can make them whatever color you want
Scrim button:
Navigate to your resource folder, open gamemenu.res
Put your connect info in the home server section.
Damage indicator ON/OFF:
Navigate to your scripts folder, open hudlayout.res
Look for this section.
Use // to disable ad delete the // in front of the one you want to enable.
TargetID's. CLASSIC or ALT:
Navigate to your resource/ui folder, open spectatorguihealth.res and targetid.res
Use // to disable and delete the // in front of the one you want to enable.