Hi,
IOS:c3560-ipbase-mz.122-25.SEB4.bin is a SMI software. To upgrade it to EMI you have to purchase an EMI licence CD-3560=. First you have to upgrade it to EMI using that part number and then upload the MEI image.
c3560-ipservicesk9-mz.122-25.SEB4.bin is the EMI image that you will download and upgrade on the switch using the normal TFTP mehtod.
HTH, Please rate if it does.
-amit singh