I have been able to extract the reflectance values across the 6 bands of Landsat by converting the overlay vector>vector to ROI>ROI to ASCII. However, I found that my new ASCII text file has only reflectance info and location info across the 6 bands for 686 rows, however if the vector file has any other attribute fields (eg. plot/sampling point name), they didn't translate/transfer to the new ASCII text file! Basically, what I am looking is a tool/method which would let me transfer the reflectance values from the raster as attribute fields in the vector file! So my final vector attribute table would show plot name, location info, reflectance across the number of bands in the raster (Note: all data are in the same projection and datum!).