good idea
i will let do it overnight
i once tried overnight i guess. long time ago.
then it froze and i never used it again (memtest)
if its freezing i cant read out which is out of order, i guess
i have the apple 512MB inside and additionally 1GB from Samsung.

i once orderer another 1GB RAM to get 2GB alltogether
i had to send it back after 2 month as i had too much freezes,
maybe the slots where the RAM reside are defective? how to test that please?
i dont understand, if they are defective, why can i work with it for 6 month without
any problems or panics?

maybe my airport is causing the panics. i heard that the airport software can cause panics.

Check this Apple service page. Your Powerbook could have this issue. The affected serial numbers are part way down the page.
http://docs.info.apple.com/article.html?artnum=303173
From that article

ah. thanks great!

i also know the problem now:
"about this mac" shows only 1GB RAM.
but i have 1,5 GB installed. this means the 512MB isnt recognized,
before i had the 1GB ram into this slot and it only showed 512MB in "about this mac"

so. its the slot is corrupt yes?
but apple lists only serials between W8503xxxxxx through W8518xxxxxx
and i have W8540....

so i dont get it repaird? i have still warranty.

what would you do now?

thx

Call Apple and have it taken in for service.