Speeding up iMac (early 2006 I have an early 2006 iMac, the first with Intel CPU and now I am looking for speeding it up a little. I maxed out the RAM (2G) and my only other option is to install an SSD drive there. 


First of all, I would like to know if this is a good idea to speed up my iMac? 
Shall I take my iMac to the service for this installation or I can try this on my own at home?
Would it be possible to keep the current primary hdd as a secondary hdd in the machine or there is no space inside?
SSD will make everything feel faster, but it's kind of pricey. Your internal HD is probably wearing out anyway, so it's not a bad idea to substitute it. If price is an issue you can buy one of the new 7200rpm with 32/64MB of cache, and do a clean install. Before moving your data into the new HD, install your Applications. This way they will reside in area of the disk which can be retrieved faster.