I have max manila 2.5 installed and you can turn on/off the calendar and call history.
ALSO there's a few tweaks in this thread for home screen mods that i ran across.. (along with a pic of my home screen.. I lost the file so I can't attach it here)
link:
http://forum.ppcgeeks.com/showthread.php?t=115013
the home screen mods can get rid of your quick links.. the background squares etc. .and max manila doesn't slow down your phone.
I hope this helps