Fearing to bring down the wrath of---never mind. A boxblade will perform that task. I used a 48 on my BX, the Kubota 7548. KK has a very similar XB 48 inch. They also have a 42 inch which might be a better choice in really heavy soil. With the boxblade you could tear up the old drive and then back push it into a pile which would then be scooped up with the FEL. New top soil could be purchased and spread using the FEL and boxblade and then smoothed by bacdragging or get a flexible harrow like in the Northern catalog for about 300 or 400 dollars and drag the area to prepare a seed bed and then using a push broadcaster put out the seed and use a roller to push it in or not--that is optional.
I think you will find it cost effective to get the FEL now. I am sure there is someone who has more time on a BX other than me but not many--my bio needs updating cuz my BX is well broken in now. My BX is currently with my parents, my sister and husband where all three of us own acerage plots within a stones throw of each other, the 2410 will have to soldier on here alone. This was the plan all along, I just thought orginnally I would keep the BX here longer but the work is piling up down there, hoses and stuff. It will be well cared for there.
You might look at the XB-BX thread--I posted the cover pic of the KK XB catalog. Some of their stuff is availble at Atwoods. Check it out. J