If you are planning on doing this yourself there are a few things you need to be aware of.
Don't touch the memory chips unless you are either wearing a static earth strap or earth yourself before touching it.You'll probably fry the chips.
Remove the power supply mains lead as part of the motherboard is always live.
I would recommend that you use Crucial memory because not only can they test your PC online they will advise you of the correct memory which will have a lifetime guarantee.
If you buy a pair of 1Gb you can reuse the existing memory in another PC as you say.
If your existing PC has an onboard video card then your memory will be shared with that so You won't necessarily have the full 1gb available
Do check that your service packs are up to date as the software will almost definitely require it.
best of luck
Don't touch the memory chips unless you are either wearing a static earth strap or earth yourself before touching it.You'll probably fry the chips.
Remove the power supply mains lead as part of the motherboard is always live.
I would recommend that you use Crucial memory because not only can they test your PC online they will advise you of the correct memory which will have a lifetime guarantee.
If you buy a pair of 1Gb you can reuse the existing memory in another PC as you say.
If your existing PC has an onboard video card then your memory will be shared with that so You won't necessarily have the full 1gb available
Do check that your service packs are up to date as the software will almost definitely require it.
best of luck