They basically writes the boot loader back into the boot sector of the disk. I do not think it will effect the partitions. I have used the command ion the past to rebuilt my boot record after a dual boot set up and it didn't effect my partition. Or wait for Crabby to post to be sure if he has more info on the issue.
__________________ Vista Ultimate 32Bit On:Asus P5K Mobo
Intel C2D E8400 3.00/Xigmatek HDT S1283 /3Gig Ram/ATI HD2600XT 256 PCI Express /550Watt Ps/ Antec P-180B Case
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