Deleted files still there?

If anyone has a clue, I'd love to hear it.
I have a wireless network at home consisting of a PC with Windows XP and two Apple iBooks.
I tranferred about 30 gigs of images from one iBook to my Windows machine and then from the PC, deleted the transferred iBook images by dragging the folders into the trash on the PC.
The folders disappeared from the iBook desktop, but the hard drive still shows that I have used 35 of the 74 gigs I have on the machine.
I do not have 35 gigs stored on this iBook.
Although the images appear to be gone (they don't show up on a search), they still appear to taking up space on the drive.
Any ideas?
Thanks,
David

If you restart, or relaunch Finder, the space should become available.

surfwax95 said:

If you restart, or relaunch Finder, the space should become available.

Click to expand...

Thanks for the reply .. I'm way beyond that .. this happened 4 days ago and nothing I can think of has worked.

Well alright.

Take a look at Disk Inventory X, a utility to help you figure out what's taking up space on your HD.

surfwax95 said:

Well alright.

Take a look at Disk Inventory X, a utility to help you figure out what's taking up space on your HD.

Click to expand...

Thank you ... will try that now.

OK .. ran the program .. I have a file of 26 gigs named .sparseimage. Says it is a sparse disk image - disk image mounter.
Is that my problem or is that correct?