i dont know about freeware alternatives, but "obtaining" the official SDK's is illegal, so you wont get help with that here.
__________________
http://www.generalemu.net/
Intel Core 2 Quad Q6600 @ 3.4Ghz (425x8), Leadtek GTX 280 1Gb, 1.8Tb HDs, 2Gb Corsair DDR2-800 @ DDR2-1020 5-5-5-18 Dual Channel
Dont PM me for help, use the forums, thats what its for!