Altering Anaconda's environment

I need to change the size of the tmpfs (/tmp) filesystem used by 
Anaconda during a kickstart. I DO NOT need to change the configured /tmp 
filesystem for the installed system.

By default, Anaconda allocates 50% of available RAM for the /tmp 
filesystem. That is the same default allocation used for the installed 
system. But while I could (and don't want to) change the size of that 
filesystem for the installed system, I haven't found a way to change it 
during kickstart.

I've tried changing the size with a %pre section using "mount -t tmpfs 
-o remount -size=75% none /tmp". But it seems that the %pre section runs 
before the initial mount occurs. I could add a command like that 
somewhere in the body of the kickstart file but I have no idea where.
-- 
Dave Close