a text mod is takingg a piece of text in the game, and changing it how you want...
when he puts no hex value, that means that YOU get to change it to be what you want
EXAMPLE

#Restrain
0x0049f7e8 0x--------
0x0049f7ec 0x--------

in offline mode you can restrain people. so if you take that code, copy it into your browser, all the way on the right side in the ascii part, it should say Restrain, now all you do is you take the letter, lets say you go to the R, click X on it, and change it to whatever you want, say you change it do a D, so then it will say Destrain in your ascii.
Now find a person and rifle butt them until they give up. Now go up to em and see if it worked correctly and says "Destrain" instead of "Restrain"

the ones that already have a hex value are already put in and saved so like....

#Fags Eliminated
0x00597D44 0x47414620
0x00597D48 0x53544547
0x00597D4C 0x494C4520
0x00597D50 0x414E494D
0x00597D54 0x00444554
0x00597D58 0x00000000

that means that if you turn that code on, instead of it saying "All Seals Eliminated" or "All Mercenaries Eliminated" (idk which one it is) it will say "All Fags Eliminated" but only on your screen. Rep + if you liked it and it helped you