No, it's easy to do. Check macsales.com for a video. You might consider buying RAM from them, they are very reputable. I buy my RAM from them or NewEgg.
I live in Brisbane Australia and got my Crucial 2Gb memory in 4 days from http://www.crucial.com/
The site has a program which detects what your system has now and then you can pick the one you need/want
It cost me US$52...A$83 which compared to A$140 from local shops