So I just put the iso thing on a disk, wipe the SSD clean, remove the HDD, and reinstall the OS with the cd key I found in magic jelly bean?
Essentially.
You need to burn the Win7 ISO
as a (DVD) image file. Not just copying the file to a disc.
To wipe the SSD clean, properly, would involve a secure erase. Which can be done with a bootable Linux LiveCD/DVD, and some Terminal commands.
Removing the HDD, and plugging the SSD into the primary SATA port is a good idea, before re-installation of the OS.
Make sure that in your BIOS settings, you have your SATA ports set to AHCI mode, and set your boot device order to boot from CD/DVD before HDD.
If you want, you can boot the Win7 DVD, and click "custom", and then when you get to the HDD/SSD partition screen, hit SHIFT+F10 to open a Command Prompt, type DISKPART.
Type LIST DISK. It should show the 120GB SSD.
Type SELECT DISK #, where # is the number listed for the SSD.
Type CLEAN
then type EXIT
and EXIT
Then on the screen with the partitioning tools, click "re-scan disks". Then create a partition, and format it. When you format it, it sends TRIM commands for all of the unused sectors on that parition.
Then select that partition, and install Win7.