This pack actually contains two maps:
• Cleicert - This is the new remake, an entirely new map, that replaces the original.
• Cleicert_old - This is a new revamped version of the original map.
...If that's not confusing enough, the items traditionally farmed on this map are still on Cleicert, though Cleicert_old is a little easier, and there, you can get a key that allows you to shortcut most of the new Cleicert.
Downloadable at Ye Old Downloads Section or any of the official servers*. * If you want to download new Cleicert from an official server, you will have to delete the original cleicert.bsp in your maps folder first.