Xtreme Graphics Port (XGP) is Biostar's unique engineering solution of adding limited AGP graphics card support to chipsets that do not support AGP slots. The XGP slot is not compatible with all AGP graphics cards. If you plan to use the XGP slot, make sure to install your AGP graphics card's drivers first and avoid installing any drivers for the onboard graphics (if applicable).
based on that, we really have no way of knowing unless someone has actually tried your brand with that mobo, which i doubt anybody has.
another option you have is to get a pci-express mobo that also has integrated video.. that way you don't have to have money right away...
or does the mobo you're considering have integrated video as well..? because i've seen mobos with pci-express and xgp slots...