I have to say thx for this perfect guide it work quite fine on windows xp 32 bits, but I recentrly tried to run it on vista 64 bits dans the walker 10.7.4 don't start. Il tried the compatibility option and to run it as administrator but it didn't change anything. More recent versions of walker start on vista 64 bits. Is there anyway you know that I could use it on vista 64 bits?