Mandrake will give you the option to resize fat32 partitions during install.
This
screenshot is for MDK 9.0 but it's got the same options as 9.1 except 9.1 can now non-destructively resize ntfs partitions,also.Click on the arrows at the top right corner to see more screenshots.
Anyway,when you get to the partitioning section of install,this is what you'll see.
HTH
lynch