File list (Check if you may need any files):
_xmsgs\xst.xmsgs
templates\coregen.xml
xst\dump.xst\addrgen.prj\ntrc.scr
...\........\butterfly.prj\ntrc.scr
...\........\cotrol.prj\ntrc.scr
...\........\fft256.prj\ntrc.scr
...\........\topcontr.prj\ntrc.scr
...\work\hdllib.ref
...\....\hdpdeps.ref
...\....\sub00\vhpl00.vho
...\....\.....\vhpl01.vho
...\....\.....\vhpl02.vho
...\....\.....\vhpl03.vho
...\....\.....\vhpl04.vho
...\....\.....\vhpl05.vho
...\....\.....\vhpl06.vho
...\....\.....\vhpl07.vho
...\....\.....\vhpl08.vho
...\....\.....\vhpl09.vho
...\....\.....\vhpl10.vho
...\....\.....\vhpl11.vho
...\....\.....\vhpl12.vho
...\....\.....\vhpl13.vho
...\....\.....\vhpl14.vho
...\....\.....\vhpl15.vho
...\....\.....\vhpl16.vho
...\....\.....\vhpl17.vho
...\....\.....\vhpl18.vho
...\....\.....\vhpl19.vho
...\....\.....\vhpl20.vho
...\....\.....\vhpl21.vho
addrgen.vhd
addrgen_summary.html
butterfly.vhd
butterfly_summary.html
cosrom.asy
cosrom.edn
cosrom.ngo
cosrom.sym
cosrom.v
cosrom.veo
cosrom.vhd
cosrom.vho
cosrom.xco
cosrom_flist.txt
cosrom_readme.txt
cotrol.ngc
cotrol.ngr
cotrol.vhd
duram1.asy
duram1.edn
duram1.ngo
duram1.sym
duram1.v
duram1.veo
duram1.vhd
duram1.vho
duram1.xco
duram1_flist.txt
duram1_readme.txt
duram2.asy
duram2.edn
duram2.ngo
duram2.sym
duram2.v
duram2.veo
duram2.vhd
duram2.vho
duram2.xco
duram2_flist.txt
duram2_readme.txt
fft256.cmd_log
fft256.lso
fft256.ngc
fft256.ngr
fft256.prj
xst\dump.xst\addrgen.prj\ngx\notopt
...\........\...........\...\opt
...\........\butterfly.prj\ngx\notopt
...\........\.............\...\opt
...\........\cotrol.prj\ngx\notopt
...\........\..........\...\opt
...\........\fft256.prj\ngx\notopt
...\........\..........\...\opt
...\........\topcontr.prj\ngx\notopt
...\........\............\...\opt
...\........\addrgen.prj\ngx
...\........\butterfly.prj\ngx
...\........\cotrol.prj\ngx
...\........\fft256.prj\ngx
...\........\topcontr.prj\ngx
...\........\addrgen.prj
...\........\butterfly.prj
...\........\cotrol.prj
...\........\fft256.prj
...\........\topcontr.prj
...\work\sub00
...\dump.xst
...\projnav.tmp
...\work