newjack to make a white shockbeam to yourself, you can open your game, open console and type those two commands there:
set ShockBeam Texture Static_A00
set ShockBeam DrawScale 0.01
first is a white texture, second is the size of the shockbeam itself
it must be done in a singleplayer map, like deck16 or anything, just not on the server, since the server wont allow you to change those parameters, just change it in a singleplayer first, then go to the server
to make it easier, you can create a file without extension in UT/System folder, like "whiteshock", and put these two commands there, then, simply type in a console "exec whiteshock"