Nope. There's a chance it will be recognised by HDtools as something entirely different, but just correct those figures until they represent the correct values.
For example: I have had an 20 GB drive I used for testing showing up as 60 MB. After partitioning (which took a while to figure out), it worked without problems.
Nice, that's good news as I can get my hands on some cheap drives but they're all 37GB. Have to purchase a 50pin to 68pin adapter though but they're pretty cheap

Thanks for the NFO Jiffy, just worried about the power adapter but will find out tomorrow when I give it a shot :-)