I am trying to install BackTrack 5 R1 from CD on a windows 7 home system.
I made it to the “Prepare Disk space” step.
I was expecting to select the “side by side” option (dual boot).
The “side by side” option is not present, only the “erase or manual”.

Here is what the “Prepare Disk Space” screen says.

This computer has several operating systems on it.
Window 7 (loader) /dev/sda1 NTFS 208M
Windows Vista /dev/sda2 NTFS 978G
Windows Vista /dev/sda3 NTFA 21G (Restore section I think)
/dev/sda4 FAT32 100M

How do I set up the dual boot in the manual mode and not mess up what I have.
Or is there other tricks to get the "side by side" option to show up.

Thank you in advance for any help,