A few of you may find this handy. I made this little routine for the end of my batch file. It time and date stamps the log file. I had to tinker around with a few other aspects of the original go.cmd file in order to get it to work right. If you have issues let me know and I'll post my whole bat.
if not exist documentslogfilestemp md documentslogfilestemp
move Documentslogfiles%computername%_load.log Documentslogfilestemp
FOR /F "usebackq tokens=1" %%n IN (`dir Documentslogfilestemp /b`) DO @FOR /F "usebackq tokens=2,3,4 delims=/ " %%d IN (`date /t`) DO @FOR /F "usebackq tokens=1,2 delims=: " %%t IN (`time /t`) DO @ren Documentslogfilestemp%%n %computername%-%%d%%e%%f-%%t%%u.log
move Documentslogfilestemp* Documentslogfiles
rd Documentslogfilestemp