RAM and Processing speed

I'm sure this is painfully obvious to a lot of you here but I was wondering how much importance one has over the other.

For example a friend owns a computer with the following specs:
2.14Ghz
468mb RAM

It runs quite slowly even when asked to open a program such as Dreamweaver and I was wondering whether this could be fixed with a RAM upgrade or it could be improved through other means.
I apologise if that's not being specific enough.

Sorry for the stupid question and thanks in advance.

Yep, RAM's gonna be a bottleneck there. Double it.

Thanks for the input.

You're running Win XP, I presume ? Then 512 MByte is the minimum recommended RAM if you want to work with the likes of Dreamweaver & Co, better get 1 Gig (it's not that costly really, and XP really profits from more RAM). Second, check your Autostarts and kick out 99% of the crap running in the background (except for the virus guard, nothing really needs to run in the tray)

yeah it definitely need to double it.  Nowadays 1 gig is minimum to be honest 2 gigs to better especially if you have dual channel and have 4 slots.  Windows is definite Ram whore