I have the enqueue option in my context menu... can't tell why you don't...
if you want to add it manually, you can edit the .avi files properties manually (with winXP: windows explorer > tools->folder options->file types->avi->advanced)and add it
the command line is exactly the same as for normal play, plus the "add parameter". that is:
Code:
C:\Program Files\BSPlayer\bplay.exe "%L" -ADD