Use an Intel Tower Quad - used Macs for about 15 Years.
Needed to upgrade to Leopard, before senility, makes it even more difficult, to understand.
As usual, I buy Apps. upgrades as they appear, via Version Tracker, for Leopard O.S.
Drive Genius - breathtaking - Leopard report - Upgrade $59 Dollars ???.
Its a time wasting mess, of a web site!. Paid for the upgrade, (Otherwise, I can't use it)
Not being very intelligent, it then took 45 Minutes, arguing with the form, to try, and buy it.

Surprisingly, this Genius, + Leopard, will not allow me access, to my four big internal disks, (They are blanked out).
Then after another hour, find that under Leopard, I Can only access external disks, those outside the box, with dangly cables.

With Normal Apple improvements, learned that this program now has to be opened in Tiger, (Which I've just got rid of, for Leopard.)
But alternatively, you might wish to create a DVD to open the fixed internal disks, (After Four more hours, I've given up, demoralised, and beaten.) I'm only a man.

Its free, I just want it off my machine, and don't want to deal with the company again.