Just a quick note here. This is an article based on the REG file from Kelly's Korner (@www.kellys-korner-xp.com/xp_tweaks.htm). I'm not fond of downloading REG files and running them even if I have checked what it's doing. I'm putting a note here just for me:

1. Start > Run > Regedit > OK
2. Browse to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
3. Create New DWORD Value
4. Name it "MaxRecentDocs"
5. Double-click on the new DWORD
6. Set value data to "19" ( equals 25 )
7. Leave Base as "Hexadecimal"
8. OK
9. Restart your computer