upgrade OS 9.2 to OS 10

[David B. Webb]

How do I add memory to my imac and are their manuels
to use?

 

[Hughvane]

How do I add memory to my imac

Depends on the model, it's usually a straightforward process, just follow the rules about earthing. This may help:
http://forums.whirlpool.net.au/forum-replies-archive.cfm/170252.html

and are their manuels to use?

http://home.earthlink.net/~strahm_s/manuals.html

I've actually found watching a How To on YouTube to be helpful. Just type in iMac in the Search function and there are a lot of videos showing how to do various upgrades, maintenance and the like.