Help with hard drive cleaning!!!

Hello... is there a software suite that allows me to wipe the "empty" (but not technically empty) areas of the disks, while allowing me to keep the other data intact?

If I understood you correctly, you want to wipe the data that is marked as deleted, right? That's that one that you deleted by pressing del in your file manager but unsure whether it was overwritten with new data. If so, there's practically a lot of tools here that wipe out the free disk space while leaving the used disk space intact, such as BCWipe http://www.jetico.com/bcwipe.htm, QuickWiper http://www.aks-labs.com/solutions/ [...] -space.htm, R-Wipe http://www.r-wipe.com/Disk_Cleaning_Download.shtml and so on. Which is better? Dunno, probably the one that is smaller or the one you trust better because you've hear about it somewhere else.