You don't say if you have other OS's on other partitions, do you ?
I ran into the same problem with the 200 meg partition, but solved it when I discovered my first partition, which has XP Pro, was leaving the Active status on, even though the partition was hidden.
Once I fixed that, I re-installed Win 7, no 200 meg partition was created this time, and now all 3 OS's ( XP Pro, Vista64, Win7 ) work fine ( using a hidden partition system with GAG as the boot manager )