I can see why you are confused. I'll have to make some changes to make the downloads less confusing.
Here's what you need, first download and install (mEAn) version 5.50.50 for CS 1.5, we'll upgrade it to CS 1.6 in the next step
http://meanmod.bots-united.com/mean/...anmod50050.zip
After you install 5.00.50, download version 5.50.13 for CS 1.5 & 1.6
http://meanmod.bots-united.com/mean/...0.13(BETA).zip
Delete the 5.00.50 DLL and replace it with the new 5.50.13 DLL which is named as mean_cs16.dll.
I hope this is now clear enough.