Partitioning Question

[wade at wadesmart.com]

10152006 1941 GMT-6

Im partitioning a 200GB hard drive. I have usually used ubuntus automated partitions but Im wanting to do a bit more. I have read on the forums about some sizes but I wanted to run this by those who would know: 

root 8GB     Ubuntu 6.06LTS
swap 1GB   
home 40GB    my files
mail 10GB    my email
second 40GB  future Edgy install -> will have its /home in this partition

Ok. /root has to be primary, and the /second has to be a primary, so can the others be a Extended Partition?
Or should I do this differently? or What?

wade