The specs for the notebook say that it takes a 2.5" 9.5mm SATA drive.
The specs for the drive say the same.
I have no idea how easy / hard it is to get at the hard drive of that machine. On the other hand, changing from HDD to HDD you should be able to just clone your existing drive and boot from the new one.
The manual has nothing on working with the hardware: http://www.asus.com/Notebooks/Versatile_Performance/K61IC/#download