Submitted by mrchipb:

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Regardless of whether you choose to install over a network or download the installation files to your hard disk, some or all of the Setup files are copied to your hard disk. This allows you to reinstall more quickly if necessary. If you want to reclaim the disk space, you can remove the Setup directory.

To remove the Setup directory:

•In Control Panel, double-click Add/Remove Programs, and then click Internet Explorer 6.•Click Add/Remove.•Make sure the Restore the Previous Windows Configuration check box is selected, and then click Advanced.•Click Remove Folder Containing Windows Update Setup Files, and then click OK.•When prompted whether you want to continue, click Yes.

NOTE: Depending on your options, this can free up 10-20mb of space. Also, you would no longer be able to re-install IE6, from your hard drive.
This does not affect the repair function.