Actually the board isn't THAT crappy, consider the competition (Asus A7V266 for example) and it's actually superior to most high end boards of it's day!
If you find a BIOS that has multiplier adjustments, you could try a mobile barton, but you'd also have to confirm the new BIOS supports Bartons. A mobile Barton (such as the XP-M 2500+) would allow you to set the multiplier manually and get your speed up.
<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>