Too bad I don't understand how to do a single bit of this shit! Hooray! My life is ruined!

An hour ago, I got this mod off of game banana which was a mod that was supposed to give you 42 crosshairs. I followed the incredibly easy steps and I went into TF2 to test them out. At first, I tried an offline practice server, they worked, I then went to a regular server, and they did not work, they didn't work when I went into Casual either. I wanted these so I could use them to help me with my aim, but since I can't use them on multiplayer servers, I can't practice against players. Bots don't act anything like players. I don't know if this is the correct forum category for this, and if it is, I'm dearly sorry. I'm new here and was banned off of the Steam TF2 forums, which sucks, but this is where I went, I'm in desperate need of help, so please respond because I' worried sick...