Not Enough Memory To Load Specified Image...

I downloaded Slackware 13.37 on a DVD (32-bit version). The MD5 check
is fine. I am not much of an expert with Linux, but I just want to
install Slackware so that I can play with it in my free time and
hopefully learn new things.

I am trying to install on an 11-year-old computer. It has a Pentium III
1100 MHz, 1.5 GB of memory (that's the max allowed!), the motherboard
is a Tyan Trinity 400 (S1854).

Upon booting up with the install DVD, it reaches the point where it
says "Loading initrd.img" and then I get the following error message:

Not enough memory to load specified image.

I have tried using two kernels: hugesmp.s and huge.s. Same error
message! I've also tried adding the line MEM=1GB. It did not work.

Am I out of luck? Is my computer too old for Slackware 13.37? (No
problems running Ubuntu 11.04 or Windows 7...)

My system seems to be meeting the minimum requirements:
* 486 processor
* 64MB RAM (1GB+ suggested)
* About 5GB+ of hard disk space for a full install
* CD or DVD drive

I guess I could try to install an older version of Slackware, but was
wondering if there is anyone who knows some tricks for installing 13.37
on an old desktop.

As I said before, I am not much of an expert with Linux.
tb