[arch-general] How to align partitions?

Hi, I'd like to know how to create aligned partitions on a 160GB disk which uses a 512B sector size. (Partition table: msdos) I've got the theory [1, 2], but I can't make it work. I'd like to have three partitions: 1. ext3 ~ 100mb /boot 2. linux-swap ~ 1GB swap 3. ext3 (for the rest of the system) How to adjust the sizes? I'm planning to encrypt swap and the third partition with dm-crypt (not LUKS). Separate /boot is needed to mount and decrypt them after booting. [1] http://forums.gentoo.org/viewtopic-t-838522.html [2] http://superuser.com/questions/349887/gnu-parted-how-to-deal-with-the-error-... Thanks