[15:23:09.44] c:\test>dir 10* mer*
03/09/2009  15:06        10,516,481 10MB.1
03/09/2009  15:06        10,516,481 10MB.2
03/09/2009  15:06        10,516,481 10MB.3
03/09/2009  15:07        10,516,481 10MB.4
               4 File(s)     42,065,924 bytes

[15:23:16.89] c:\test>perl -pE1 10MB.1 10MB.2 10MB.3 10MB.4 > mergedOutput.txt

[15:23:19.21] c:\test>dir mergedOutput.txt
03/09/2009  15:23        42,065,924 mergedOutput.txt