How to change the folder Centminmod is installed?

I received a VPS with 2 partitions as you can see in the following lines and was wondering how can I make Centminmod installer use a partition other than /?

$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 30G 888M 30G 3% /
devtmpfs 474M 0 474M 0% /dev
tmpfs 496M 0 496M 0% /dev/shm
tmpfs 496M 13M 483M 3% /run
tmpfs 496M 0 496M 0% /sys/fs/cgroup
/dev/xvdb 30G 45M 28G 1% /mnt/data
tmpfs 100M 0 100M 0% /run/user/1000

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