i ran disk utility on my macbook pro last night and it said i needed to repair my hD and to insert my installation disk to do so...problem is im currently running Snow Leopard 10.6.5 and i no longer have my Snow Leopard installation disk...i only have my original Leopard one that came with my mbp...can i use that one and not worry about any info being lost? or do i have to buy another Snow Leopard one?