Trying to test then install LL 3.4 on old Dell Latitude D800

[rokytnji]

4) now here’s where I’m unsure. Do I shut down right after installing then reboot and do the forcepae — forcepae again THEN find the folder and file and make the changes per Goldfinger’s directions

Yes. That will work also. Instead of using a live session like I mentioned earlier.
Just a mention. If you know how to make backup text files in /.
Like I do. Backup the file you wanna edit before making changes

Example off of my AntiX install

Code:

$ sudo -i
[sudo] password for harry:
root@biker:~# cd /etc/default/
root@biker:/etc/default# ls
acpid          bsdmainutils   devpts    hdparm       locale      numlockx  smartmontools    unclutter
acpi-support  console-setup  extlinux  hwclock       networking  rcS     spamassassin    useradd
aufs          cron         gdomap    ifplugd       nfs-common  rsync     ssh        wicd
avahi-daemon  cryptdisks     grub      irqbalance  nss           rsyslog     tmpfs
bluetooth     dbus         halt      keyboard    ntpdate     saned     ufw
root@biker:/etc/default# cp grub grub.backup
root@biker:/etc/default# ls
acpid          console-setup  gdomap      ifplugd     nss    saned           unclutter
acpi-support  cron         grub      irqbalance  ntpdate    smartmontools  useradd
aufs          cryptdisks     grub.backup  keyboard    numlockx    spamassassin   wicd
avahi-daemon  dbus         halt      locale      rcS    ssh
bluetooth     devpts         hdparm      networking  rsync    tmpfs
bsdmainutils  extlinux         hwclock      nfs-common  rsyslog    ufw
root@biker:/etc/default#
root@biker:/etc/default# exit
logout
harry@biker:~
exit

Notice the new copied file grub.backup in my readout above. What I did was copy my old grub text file with the cp < copy > command using terminal.
Named the new copy grub.backup. This now gives me a original backup file in case I mess up something and cannot boot. I can delete my edited file and rename my backup file back to just grub to start over again. I hope you get the idea of what I am suggesting. Good Luck.