Freeing up RAM

It turns out Leopard uses more RAM when idle then when starting up, so I was wondering if I could free up some RAM by disabling some processes in Leopard.
Would anyone kindly walk me through the steps required to free up the RAM that I need? I'm using 1.25 GB (two 512 sticks and two 128 sticks)

Then I would look at when you last did a full restore with SuperDuper.
As you add, install and update, there are GBs of files being written, deleted, temp files (when you update or write a file, it writes a new file as "temp" then deletes the old file and renames the new file to what it should be).
SuperDuper unfragments files, orders folder directories into one, and optimizes all free space into one unfragmented section.
And use TechTool Pro or Disk Warrior to keep files and directory in tip top shape.
You may also just need or want a faster and larger hard drive to deal with what you have and that would launch files faster, not take as long to find files or seek all over the disk drive. I keep my boot drive very lean, mean and it helps, works for me. And I would keep boot drives to less than 50% use, the outer first half of a drive may get 90MB/sec sustained read/write while it drops off at 40% used and falls to half or so plus the time to find what it wants.
Your system drive is always working, and your home folder is constantly being written to, so I have two drives, one for system, and 2nd drive (not partition) for my home account. Two wheel drive.
Using RAM is not the issue, unless you don't have enough. Programs are bigger. UB versions have a lot more (even if only what is needed is loaded into memory).
A new 640GB Caviar is excellent and $89 (Newegg) or $104 (OWC). And achieves that 90MB/sec. Or there is $299 for 10K VelociRaptor that is only 300GB but even faster and more important probably, very very low fast seeks, to load code and data into memory (it isn't just the sustained and random I/O but that helps and easier to test).
Sounds like a disk drive bottleneck, not memory. Adding another 1GB of memory might help too.

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