BH6 mb, can I use AGP with 133 fsb?

[echolune]

I'm still running an Abit BH6 from '99, been a great motherboard, but I was wondering if anyone knew if there was a way to get the BX chipset to support a 1/2 agp multiplier? The BIOS only shows 1/1 and 2/3, but I seem to see several people saying they are running a BX chipset at 133 with an AGP card, so are they just crossing their fingers and hoping their card is stable at 87mhz? I'm trying to wring the most I can out of this board till I just bite the bullet and upgrade this fall once the Athlon chipset wars get into full swing.

Thanks in advance for any help.