Thanks, Snufkin.
You are right. I ran several tests and the results were clear.
When I run "Install Packages" without any cards, the search finishes almost instantly.
With my Panasonic SD 256mb (Super High Speed) mounted, the search is done a bit slower, though not a very noticeble difference.
With my Kingston CF 512mb mounted, the problem comes in.
I remembered when I first used the CF card on my C860 the performance was not that bad. Or is it an illusion?