Need suggestions before install OEL5.0 on IBM3400

Hi,

I need to install Oracle Enterprise Linux 5.0 on IBM3400.Before start it,I expect your valuable suggestions regarding partition size…etc.

This server is having 146 GB of hard disk and 4GB of RAM.I need to create 15 restricted users on this server.These 15 users will access their folders /home/x,/home/y…etc from Windows systems.And the size of this folder is 5 GB.So I need to allot 75GB for /home partition.The rest of space for other following partitions

/boot,/tmp,/var,/usr/local,/usr,/,/opt and Swap

Here I have planned to create swap partition for 10GB after /home partition.

Oracle will also install on this server.whenever FTP require,that will also enable as per our client request.

I need your valuable advises.