iTunes Out of Memory

I have posted this topic a while back but still have the same problem
Every time I update iTunes - when I go to run it - I get the error that iTunes cannot run because there is not enough memory.
I have a G5 1.8 with 1 gig of RAM. I actually upgraded the RAM thinking that that would fix the problem. It didn't.
However - if I don't use the Software Update facility - and actually download iTunes seperately, unpack it and install it - I don't get the error.

Any ideas?

Thank you.

The iTunes.rsrc got deleted... Try re-downloading iTunes and reinstalling, if it doesn't work I will give you my rsrc file and instruct you on how to install it.

--Good Luck