I have a Asus WL-500GP with oleg firmware

I have two mount :

/dev/discs/disc0/part1 / opt - -+ 50 GB ext3
/dev/discs/disc0/part2 /tmp/harddisk - -+ 10 GB FAT32
/dev/discs/disc0/part3 /swapon

I have download the package http://www.twonkyvision.com/Download...media-asus.zip for Asus WL-HDD 2.5

When i tray to install , it will be instaled in /tmp/harddisk for default, how can i change to install it on /opt/twonkyvision/