Quick question would it effect Linux if I upgraded my Ram from 128RD Ram to 256RDRAM (I'm going to simply pop in a second 128 RAM chip)...would I need to change any configuration options etc or would Linux detect all this with no problem?

That's depends on the kernel version you have. Some kernels below 2.2.7 (I think) had to be notified by lilo about the Memory size. here's an example:

# lilo.conf
boot=/dev/hda
map=/boot/map
install=/boot/boot.b
vga=791
default=linux
keytable=/boot/us-latin1.klt
lba32
prompt
timeout=50
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz
label=linux
root=/dev/hda2
append=" mem=64M)"
read-only
other=/dev/fd0
label=floppy
unsafe

Note the append= line.
If linux don't recognize your entire memory, insert the append line, but the size must be exactly the size of your available physical memory, if you put less memory, you will not use all memory, if you put more, you will experience a kernel panic.

In your case put, after image=<kernel image>:
append="mem=128M)"
but only if linux refuses to recognize your memory size correctly

Regards
HTT

Sorry, I made a mistake. You want to recognize 256Mb, so you must entry:

append=" mem=256M)"

in your /etc/lilo.conf file
Don't forget to run lilo.

HTT

Hmm I'll be using the Red Hat 7.1 with I believe the 2.4 Kernel? Would I still need to do all of that?

Humm... I did not have any problems with 2.4.x kernels. I don't think so.

HTT