It can alot of times, you just have to know what your doing. Just moved my cousin from an old g41 chipset motherbd to a new z68 i7 rig. I have taken several setups from AMD based to Intel and vice versa.
I "know" its possible...but read the original question...hes not capable of understanding how to do it...unless you want to type several pages of explicit instructions......and it still may NOT work....it doesnt on ALL machines...only some...
All the best Brett