OK to remove MacOSXUpdCombo10.6.6.dmg from Downloads folder to free disc space?

To free disc space I've been removing old files.  MacOSXUpdCombo10.6.6.dmg is by far the largest, at 1 GB.  I seem to recall using this file when I had to revert back to 10.6.6 after having font problems with 10.6.7.  I believe it's OK to just remove it to a backup source, but want to check before doing that, just in case.  Thanks for your council and any enlightenment on the function of such update dmgs, once they've been used.

IMHO you have a more serious problem here. If 1 GB is going to make a difference in the amount of free space you can notice then your disk is probably too full and you should be looking for more drastic solutions to gain free space such as deleting your files.
Allan

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