do i need to update SL to 10.6.8 before i can do lion. on the apple site, there are different versions of 10.6.8. one is 10.6.8 v.1.1 which is about 150 MB and the other is 10.6.8 combo v.1.1 which is about 1 GB. what is the difference? will the 1st one be good to update to lion?