I would do it in the following order:
1) have AL ready for install.
2) Download new crack.
3) Remove downloads file to desktop.
4) Back up game (hoods, lots, savedsims, etc.)
5) Restore original 'hood templates and original .exe (I have found that I often do not need to restore the original hoods, incidentally, but it may pay to be safe).
6) Install EP
7) Install new crack and empty templates
Test in vanilla game to make sure it works.
9) download AL patch and new AL patched crack.
10) test again.
11) Reinstall game from backup and downloads.
12) DELETE ALL hacks/mods from downloads.
13) Install new AL director's cut.
14) Test again. Should be good to go.