diff --git a/Docs/src/defines.but b/Docs/src/defines.but
index f6c97958..dbc5b06e 100644
--- a/Docs/src/defines.but
+++ b/Docs/src/defines.but
@@ -61,6 +61,7 @@ The opposite of !ifdef. The lines will be compiled when the gflag has not been d
 \S1{if} !if
 
 \c [!] value [op value2]
+\c [!] /FileExists "c:\path\file.exe"
 
 This command, when paired with an !endif command, will tell the compiler whether or not to compile the lines in between the two lines. If value is non-zero, or the comparison of value and value2 depending on the operator results in true, the contained lines will be compiled. Otherwise, they will be skipped.
 op can be either == or != (string comparison), <=, < > or >= (float comparison), & (bitwise AND comparison), && or || (boolean comparison).
@@ -74,6 +75,10 @@ If [!] is set, return value will be switched from true to false and vice versa.
 \c   !error "neither should this"
 \c !endif
 
+\c !if /FileExists ".\cert.pfx"
+\c   !finalize '".\sign.bat" "%1"'
+\c !endif
+
 \S1{ifmacrodef} !ifmacrodef
 
 \c gflag [bcheck gflag [...]]]
diff --git a/Source/dirreader.h b/Source/dirreader.h
index 52cebe8f..e42394fb 100644
--- a/Source/dirreader.h
+++ b/Source/dirreader.h
@@ -33,6 +33,10 @@ public:
   virtual const std::set<tstring>& files();
   virtual const std::set<tstring>& dirs();
 
+  // dir_reader always excludes . and .. AND the exclude list is private,
+  // use this backdoor if you need to match "."
+  virtual std::set<tstring>& hack_simpleexcluded() {return m_excluded;}
+
   virtual void exclude(const tstring& spec);
   virtual void exclude(const std::set<tstring>& specs);
 
diff --git a/Source/script.cpp b/Source/script.cpp
index 1c9dfa3b..2f3c900a 100644
--- a/Source/script.cpp
+++ b/Source/script.cpp
@@ -486,7 +486,33 @@ parse_again:
       
       if(line.getnumtokens() == 2)
         istrue = line.gettoken_int(1);
-          
+
+      else if (line.getnumtokens() == 3) {
+        if (!_tcsicmp(line.gettoken_str(1),_T("/fileexists")))
+        {
+          TCHAR *fc = my_convert(line.gettoken_str(2));
+          tstring dir = get_dir_name(fc), spec = get_file_name(fc);
+          my_convert_free(fc);
+          if (dir == spec) dir = _T("."); 
+
+          boost::scoped_ptr<dir_reader> dr( new_dir_reader() );
+          dr->hack_simpleexcluded().erase(_T("."));
+          dr->read(dir);
+
+          for (dir_reader::iterator fit = dr->files().begin();
+             fit != dr->files().end() && !istrue; fit++)
+          {
+            if (dir_reader::matches(*fit, spec)) istrue = true;
+          }
+          if (!istrue) for (dir_reader::iterator dit = dr->dirs().begin();
+             dit != dr->dirs().end() && !istrue; dit++)
+          {
+            if (dir_reader::matches(*dit, spec)) istrue = true;
+          }
+        }
+        else PRINTHELP()
+      }
+
       else if (line.getnumtokens() == 4) {
         mod = line.gettoken_enum(2,_T("=\0==\0!=\0<=\0<\0>\0>=\0&\0&&\0|\0||\0"));
         
diff --git a/Source/tokens.cpp b/Source/tokens.cpp
index 85ade425..39ef29df 100644
--- a/Source/tokens.cpp
+++ b/Source/tokens.cpp
@@ -246,7 +246,7 @@ static tokenType tokenlist[TOK__LAST] =
 {TOK_P_ADDINCLUDEDIR,_T("!AddIncludeDir"),1,0,_T("dir"),TP_ALL},
 {TOK_P_INCLUDE,_T("!include"),1,1,_T("[/NONFATAL] filename.nsh"),TP_ALL},
 {TOK_P_CD,_T("!cd"),1,0,_T("absolute_or_relative_new_directory"),TP_ALL},
-{TOK_P_IF,_T("!if"),1,3,_T("[!] value [(==,!=,<=,<,>,>=,&,&&,||) value2] [...]"),TP_ALL},
+{TOK_P_IF,_T("!if"),1,3,_T("[!] (value [(==,!=,<=,<,>,>=,&,&&,||) value2] | /FILEEXISTS path) [...]"),TP_ALL},
 {TOK_P_IFDEF,_T("!ifdef"),1,-1,_T("symbol [| symbol2 [& symbol3 [...]]]"),TP_ALL},
 {TOK_P_IFNDEF,_T("!ifndef"),1,-1,_T("symbol [| symbol2 [& symbol3 [...]]]"),TP_ALL},
 {TOK_P_ENDIF,_T("!endif"),0,0,_T(""),TP_ALL},