File list (Check if you may need any files):
halfadder\halfadder.cmd_log
.........\halfadder.ise
.........\halfadder.ise_ISE_Backup
.........\halfadder.lso
.........\halfadder.ngc
.........\halfadder.ngr
.........\halfadder.ntrc_log
.........\halfadder.prj
.........\halfadder.restore
.........\halfadder.stx
.........\halfadder.syr
.........\halfadder.v
.........\halfadder.xst
.........\halfadder_summary.html
.........\xst\dump.xst\halfadder.prj\ntrc.scr
.........\...\work\hdllib.ref
.........\...\....\vlg33\halfadder.bin
.........\_xmsgs\xst.xmsgs
.........\xst\dump.xst\halfadder.prj\ngx\notopt
.........\...\........\.............\...\opt
.........\...\........\.............\ngx
.........\...\........\halfadder.prj
.........\...\work\vlg33
.........\...\dump.xst
.........\...\projnav.tmp
.........\...\work
.........\xst
.........\_xmsgs
halfadder