MRU Most Recently Used

> I Rarely use the run command. One day I went there,
> typed a letter and the "OPEN: drop down list" was filled
> to the brim with everywhere I had been and everything I
> had ever done. "Hmm I said, the value of this is??????
> If I start scrolling I'll be old before I get to the
> bottom of the list." I think "Oh yeah, clean the history
> in Internet Explorer 6 and Netscape Navigator 4.7". Off
> I go Internet Explorer/Tools/General Tab/Delete
> Cookies/Delete Files/Delete all offline content/Clear
> History.
> Then I visit Netscape
> navigator/Edit/Preferences/History/Clear History/Clear
> Location Bar.
> Then I right click the Start button/Properties/Start
> menu/Customize/General/Programs/clear List
> Whoooohooo I think.
> Go back to start/run/and type a letter. whaaaaa, there
> are still about 5 left in the list.
> Then I remembered I Had installed Netscape Navigator 7
> went to a few sites, felt like I was in AOL land, and
> then removed it using Add/Remove Programs in the Control
> Panel.
> Hmm where does it keep this stuff. Asked a friend he
> said look in the registry for MRU and reset it. We
> looked in the registry, no luck.
> I went to help and put in "MRU", all I got was stuff for
> 95 and 98.
> So I put in "MRU Windows XP" got two results, "XP Support
> Center" and "Post a Question" So here I am.
>
> Thanks,
> William