The Adaptec 1460 SCSI PC card has worked well for me. Maybe it will
for you ;-).
A 4000dpi scan of a 35mm image will be about 130MB. Photoshop needs
3 times the RAM of any image you open for working space, plus some
extra for the program code. Therefore unless you want to slow your
system to a crawl with constant disk accesses you'll need on the
order of 512 MB of RAM.
There's no magic involved in replacing laptop RAM, but it can be
mechanically challenging and very delicate. You decide whether that
sounds comfortable to you.
You'll find even basic operations such as rotate and unsharp masking
to be slow on a 330 MHz machine (although 400 MHz won't be that much
And where are you going to archive your 130 MB scans? Perhaps you
should add a CD-R drive to your new SCSI bus...
Bill Fernandez * User Interface Architect * Bill Fernandez Design
(505) 346-3080 * firstname.lastname@example.org * http://billfernandez.com