Will I be able to download Mountain Lion if I add more RAM to my 2008 MacBook

I have Snow Leopard (10.6.8) and I attempted to download Xcode but couldn't; so then I tried to upgrade to Mountain Lion but couldn't because my MacBook only has 1 GB of RAM.

I talked to support and was told that even if I do add RAM there's a possibility that I will still not be able to upgrade to Mountain Lion.

Anyone dealt with this before? Any help will be greatly appreciated!

Intell said:

Unlikely. Only the unibody late-2008 Macbook can support Mountain Lion.

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So if there's nothing I can do about Mountain Lion, is there anyway I can download Xcode?