Here's my suggestion if you're asking about SPOTview 1.5:
1. copy *.BIL to the "cell" dir under your mapset
2. get the zone number, the image size and
upper-left and lower-right coords
from *.HDR as well as resolution
3. put these info into the corresponding "cellhd" dir
the last two line need to be
format: 0
compressed: 0
4. run r.compress
5. run r.support
Hope these help.
--Xin