I was currently using Redhat 9.0. I had 3 hard drives set up the following way:

First Primary: boot partition and misc stuff (not important to linux)
First Secondary: everything but /home /swap /boot
Second Primary:
Second Secondary: /home /swap

The problem comes in that I took the primary out and stuck it in another computer (reformatted) and then I remembered later that I needed to get my mysql info off of the old one.

Is there a way that I can get the computer to boot up and load the linux on there so I can get the mysql info off?

You can boot from the Linux Distribution CD and get the system up in Rescue Mode.

chroot /mnt/sysimage to mount your linux partitions
mkbootdisk <kernel version>

With this, you will be boot your system from a boot floppy.

Alternatively, you can make the disk that linux is installed on as a master and install lilo/grub, again, after getting your system into rescue mode.

While trying this second option, you will need to make a change in your /etc/fstab to help it recognise the swap drive.

Please click the AFFERO button if my answer helped.