File list (Check if you may need any files):
adder_s\adder_s.bgn
.......\adder_s.bit
.......\adder_s.bld
.......\adder_s.cmd_log
.......\adder_s.drc
.......\adder_s.gise
.......\adder_s.lso
.......\adder_s.ncd
.......\adder_s.ngc
.......\adder_s.ngd
.......\adder_s.ngr
.......\adder_s.par
.......\adder_s.pcf
.......\adder_s.prj
.......\adder_s.spl
.......\adder_s.stx
.......\adder_s.sym
.......\adder_s.syr
.......\adder_s.twr
.......\adder_s.twx
.......\adder_s.ucf
.......\adder_s.unroutes
.......\adder_s.ut
.......\adder_s.vhd
.......\adder_s.vhi
.......\adder_s.xise
.......\adder_s.xst
.......\adder_s_4bit.bgn
.......\adder_s_4bit.bit
.......\adder_s_4bit.bld
.......\adder_s_4bit.cmd_log
.......\adder_s_4bit.drc
.......\adder_s_4bit.jhd
.......\adder_s_4bit.lso
.......\adder_s_4bit.ncd
.......\adder_s_4bit.ngc
.......\adder_s_4bit.ngd
.......\adder_s_4bit.ngr
.......\adder_s_4bit.pad
.......\adder_s_4bit.par
.......\adder_s_4bit.pcf
.......\adder_s_4bit.prj
.......\adder_s_4bit.ptwx
.......\adder_s_4bit.sch
.......\adder_s_4bit.stx
.......\adder_s_4bit.syr
.......\adder_s_4bit.twr
.......\adder_s_4bit.twx
.......\adder_s_4bit.unroutes
.......\adder_s_4bit.ut
.......\adder_s_4bit.vhf
.......\adder_s_4bit.xpi
.......\adder_s_4bit.xst
.......\adder_s_4bit_bitgen.xwbt
.......\adder_s_4bit_envsettings.html
.......\adder_s_4bit_guide.ncd
.......\adder_s_4bit_map.map
.......\adder_s_4bit_map.mrp
.......\adder_s_4bit_map.ncd
.......\adder_s_4bit_map.ngm
.......\adder_s_4bit_map.xrpt
.......\adder_s_4bit_ngdbuild.xrpt
.......\adder_s_4bit_pad.csv
.......\adder_s_4bit_pad.txt
.......\adder_s_4bit_par.xrpt
.......\adder_s_4bit_summary.html
.......\adder_s_4bit_summary.xml
.......\adder_s_4bit_usage.xml
.......\adder_s_4bit_vhdl.prj
.......\adder_s_4bit_xst.xrpt
.......\adder_s_bitgen.xwbt
.......\adder_s_envsettings.html
.......\adder_s_guide.ncd
.......\adder_s_ise12migration.zip
.......\adder_s_map.map
.......\adder_s_map.mrp
.......\adder_s_map.ncd
.......\adder_s_map.ngm
.......\adder_s_pad.csv
.......\adder_s_pad.txt
.......\adder_s_summary.html
.......\adder_s_vhdl.prj
.......\adder_s_xst.xrpt
.......\iseconfig\adder_s.projectmgr
.......\.........\adder_s.xreport
.......\.........\adder_s_4bit.xreport
.......\pepExtractor.prj
.......\sch2HdlBatchFile
.......\usage_statistics_webtalk.html
.......\webtalk.log
.......\webtalk_pn.xml
.......\xlnx_auto_0_xdb\cst.xbcd
.......\_ngo\netlist.lst
.......\.xmsgs\bitgen.xmsgs
.......\......\map.xmsgs
.......\......\ngdbuild.xmsgs
.......\......\par.xmsgs
.......\......\pn_parser.xmsgs
.......\......\trce.xmsgs
.......\......\xst.xmsgs