Hello Mathias, 
Thanks for MC. Now it becones a great tools as TC ;-)  
My Request: 
Comparision file content with archives support. 
I found solution by macro: ( thread  newbielink:http://forum.multicommander.com/forum/index.php/topic,654.msg1751.html#msg1751 [nonactive] ) 
but this : 
@var $cmd = "D:\\Programs\\WinMerge\\WinMergeU.exe";
@var $selectedPaths = GetSelectedPaths();
@var $path1;
@var $path2;
if (arrayCount($selectedPaths) == 2)
{
  $path1 = $selectedPaths[0];
  $path2 = $selectedPaths[1];
}
else
{
  /*$path1 = GetSourceFocusPath();*/
  /*$path2 = GetTargetFocusPath();*/
  $path1 = GetTagValue("${leftfocuspath}");
  $path2 = GetTagValue("${rightfocuspath}");
}
MC.Run CMD="{$cmd}" ARG='"{$path1}" "{$path2}"'
can't utilize archived files 
I tried extending by studying macros API but giveup. 
Best Regards
Janusz, Poland