Archive and install is taking forever-is this normal?

Due to ongoing problems with spinning beach balls on my Intel iMac (see my post here: http://discussions.apple.com/thread.jspa?threadID=1413753&tstart=0), I decided to just archive and install late last night to see if that would help. Ten hours later, the install is still going ... and it's telling me there are more than 11 hours to go! (As I type this, on my old iMac G3, it's 61% done writing files.) This is a bare-bones reinstall, mind you—just the system and some HP printer drivers.
As I stated in the other post, my RAM is maxed out, and neither Disk Utility nor DiskWarrior have been finding any disk/directory/permissions problems (S.M.A.R.T. status consistently shows up as Verified). Apple Hardware Test hasn't turned up anything either, though I haven't let it run in extended mode; PRAM/SMU resets don't seem to have made a difference.
Obviously, something isn't right ... any ideas? Could the hard drive be on the verge of buying the farm despite indications otherwise? Could the RAM be bad? (It's from OWC, by the way.) Or could the motherboard or power supply be about to crap out?

I don't know what you are doing, but to erase the drive:
Extended Hard Drive Preparation
1. Boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger or Leopard.)
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Click on the Options button, set the partition scheme to GUID (only required for Intel Macs) then click on the OK button. Set the number of partitions from the dropdown menu (use 1 partition unless you wish to make more.) Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the volume(s) mount on the Desktop.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Erase button.

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