Unless you can find a half-height card made for a small case, there isn't much you can do. Even then, make sure it does NOT have a VIA chipset on it. Trust me on that one.
Oh, wait, how about a USB enclosure for the SATA drive? I have one I use for doing backups. Now, I'm not sure of the boot options with that board (I'm presuming you want to boot from that drive) so you may have to experiment some.
The enclosure I bought cost me about $25USD, cables and power supply included.
1)GA990XA-UD3, Phenom II 970 ,8Gb DDR3 1866, GTX670, 500Gb SATA II , LG DVD, Win 7 Ultimate 64bit
2) 970DE3/U3S3, Phenom II 955, 8Gb DDR3, GTX560Ti, DVDRW, Win 7 Ult.64 bit
3)AX78, Phenom 9600, GTX560Ti, 4Gb DDR2, Win 7 Ult.64bit
Proud volunteer USS Iowa