C:\test>copy 1.bmp/b+2.bmp/b 3.bmp
1.bmp
2.bmp
        1 file(s) copied.

C:\test>del 3.zip

C:\test>zip 3.zip 3.bmp
  adding: 3.bmp (160 bytes security) (deflated 100%)

C:\test>dir ?.zip

31/05/2011  14:34             2,376 1.zip
31/05/2011  14:35             2,376 2.zip
31/05/2011  14:47             4,472 3.zip