Passing multple files w/ custom context menu item?

Is there any way in XP to pass multiple filenames (select multiple files and right-click) to BC2 as file filters? I tried adding the following custom shell command to HKCR\*\shell\command entry but it just does nothing with multiple files selected:

BC2.exe f:\ g:\ /filters=%1;%2;%3;%4;%5;%6;%7;%8;%9

[Chris]

I just gave it a try and it looks like the command is called separately for each file selected. There may be a way to pass multiple files to a single command, but I don't know of any myself.