My sister has a Gateway, 300MHz I believe-it's got XP, and it's running painfully slow. She pretty much just uses it for IM and Music, and she connects via AOL dialup. I saw on pricewatch some 1.4GHz motherboards going for around $30. Would I be able to swap these into her case and just use all her other components? Or would it not fit? a RAM upgrade would probably be useful too. $50 is probably the max budget for this project, since she doesn't have a whole lot of money.