Study for VCP4.1 with ESXi5 Lab

I've had to rebuild my lab and downloaded and configured the 60 day ESXi5 trial on one of my boxes.
Is this a bad idea as I'm studying for VCP4.1? Should I install 4.1 instead? I've been unable to find a download for 4.1 on VMware site as it is all ESXi5 now.
Thanks
Is this a bad idea as I'm studying for VCP4.1? Should I install 4.1 instead? I've been unable to find a download for 4.1 on VMware site as it is all ESXi5 now.
Thanks
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