Kernel 2.2.x and Physical Memory

[Brian Clark]

Greetings, once again.
If I'm not mistaken, I read that the 2.2.x Kernel and later no longer made 
you add:

append="mem=128M"

..to lilo.conf to get it to use more than 64MB of RAM (in my case, 128MB).

I have 128MB of physical memory, yet it's only picking up 64 megs using 
Potato and 2.2.14.

I've also read (please forgive me for not remembering where) that using 
`append' to force detection can cause weird things to happen.

Should I just compile a new Kernel, or is just using append="mem=128M" 
perfectly fine?

Thanks,

Brian