javihyuga: Thank you very much for the answer, I thought it was impossible! 
  Sorry, I thought it was covered in an earlier posting. You can use -? to see a list of commands to pass blood.exe  
 Blood Command-line Options: 
 -? This help 
 -8250 Enforce obsolete UART I/O 
 -auto Automatic Network start. Implies -quick 
 -getopt Use network game options from file. Implies -auto 
 -broadcast Set network to broadcast packet mode 
 -masterslave Set network to master/slave packet mode 
 -net Net mode game 
 -noaim Disable auto-aiming 
 -nocd Disable CD audio 
 -nodudes No monsters 
 -nodemo No Demos 
 -robust Robust network sync checking 
 -skill Set player handicap; Range:0..4; Default:2; (NOT difficulty level.) 
 -quick Skip Intro screens and get right to the game 
 -pname Override player name setting from config file 
 -map Specify a user map 
 -playback Play back a demo 
 -record Record a demo 
 -art Specify an art base file name 
 -snd Specify an RFF Sound file name 
 -RFF Specify an RFF file for Blood game resources 
 -ini Specify an INI file name (default is blood.ini)