need help from computer builder savvy person.

[navyeoseabee]

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[monkeyman]

To upgrade to ddr3 you will need a new motherboard.
8GB of ddr2, probably not cheaper than that. 8GB is alot of ddr2.
If by donor, you mean build a new pc but use some of the parts from your current desktop, then yes.
Most likely you can use everything except the motherboard. You may need a new CPU if its not recent enough, but if you are getting a new motherboard anyway, might as well get a faster cpu. Plus you can usually get a good deal on a motherboard/cpu combo.

I guess before we get too far into this, what are you looking to accomplish with an upgrade? The reason I ask is that dram is not typically the bottleneck in a system. The hdd is the main bottleneck and an upgrade to an ssd would seem like getting a new pc.

[navyeoseabee]

i kinda dropped the idea of updating this rig, i am still using it, but looking forward to buying a new one from a guy i know. can hate the computer world, but would never live without them

[Rebelliousw0n]

Check out newegg.com You can get really good deals on motherboard/cpu/ram packages. Update for cheaper than replacing. If you could give a little info on what you have to work with I could help locate a suitable upgrade.