Yeah upgrading the RAM is a doddle, looks like it will only be 20 quid to replace the 1GB stick with a 2GB one.
Yeah I think you're probably right, an upgrade on the hard drive size would be good. I think just the amount of photos he has fulls it right up, it is probably impractical to store those on an external hard drive, too inconvenient for him. I could probably stick the old one into my new computer, have that as a dedicated drive for all those photos he needs to store when replacing it, if its compatible. I've been nagging him to clear away some of the junk in the mean time but he is a busy man
The main problems getting with it is that the boot up times for the machine and programs are very long and it is very prone to freezing. I think an SSD upgrade will probably fix it right up.
I did a quick look into what it takes for an early 2008 iMac model and I stumbled upon this
video which shows how to replace the HDD with an SSD, and it looks really challenging. Doable, with a lot of research and understanding, but very hard none the less. I don't need to worry about glue or security screws thankfully, so I think I could do it myself if I can't find anyone else who specializes in it.
What is the best way of getting the OS onto a new drive?