Hey guys, this is my setup at the moment.

DRIVE 1 (SATA) - OS DRIVE
[a few different OS's on a few partitions, all set up and working]
--Empty 100 GB ext3 partition, aka sda3

DRIVE 2 (SATA) - DATA/HOME DRIVE
--just one 500 GB partition, used as /home.

My problem is, my 500 GB home drive is almost full. I'd like to relocate some of it, like my music and photos perhaps, onto the 100 GB of empty space on my OS drive.
The partition is already made, but it's not mounted when I boot, and I'm guessing I'd need to sort out some permissions first, before moving the files and making folder links.

I'm well versed in folder linking already, it's just this other stuff I'm sort of lost with.

Thanks to anyone who can lend a hand