i dont think you need an enclosure.
turn off your computer, open your computer, hook it up, restart, copy data over??
if its not a sata drive and you dont have the spare cables temporarily unplug your CD/DVD drive and use that cable
is your current computer a laptop? if so disregard everything i just said
:thm:Just get a cheap ide to usb adapter, especially if you're looking to just get the data off that drive.
This is what I use:
http://www.newegg.com/Product/Product.aspx?Item=N82E16812189122