Not sure if this still works have to try it.
How to: open the hosts file with note pad in C:\WINDOWS\system32\drivers\etc
Copy and paste this into your host file and save should get rid of in game Ads.
127.0.0.1 madserver.net
127.0.0.1 media.madserver.net
127.0.0.1 ad.madserver.net
127.0.0.1 imp.madserver.net
After saving should look like this
# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
127.0.0.1 localhost
127.0.0.1 madserver.net
127.0.0.1 media.madserver.net
127.0.0.1 ad.madserver.net
127.0.0.1 imp.madserver.net