diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java
index c9aa3638..7bfc4e5b 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java
@@ -20,6 +20,7 @@ import java.io.*;
 import org.antlr.runtime.*;
 import org.antlr.runtime.tree.CommonTree;
 import org.antlr.runtime.tree.CommonTreeNodeStream;
+import org.apache.commons.io.IOUtils;
 import org.jf.dexlib2.writer.builder.DexBuilder;
 import org.jf.smali.*;
 
@@ -28,53 +29,73 @@ import org.jf.smali.*;
  */
 public class SmaliMod {
 
-  public static boolean assembleSmaliFile(File smaliFile,DexBuilder dexBuilder, boolean verboseErrors,
-                                          boolean printTokens) throws IOException,
-          RecognitionException {
+    public static boolean assembleSmaliFile(String smali, DexBuilder dexBuilder, boolean verboseErrors,
+                                            boolean printTokens, File smaliFile) throws IOException, RuntimeException, RecognitionException {
 
-    CommonTokenStream tokens;
-    LexerErrorInterface lexer;
+        InputStream is = new ByteArrayInputStream(smali.getBytes());
+        return assembleSmaliFile(is, dexBuilder, verboseErrors, printTokens, smaliFile);
+    }
 
-    FileInputStream fis = new FileInputStream(smaliFile.getAbsolutePath());
-    InputStreamReader reader = new InputStreamReader(fis, "UTF-8");
+    public static boolean assembleSmaliFile(InputStream is,DexBuilder dexBuilder, boolean verboseErrors,
+                                            boolean printTokens, File smaliFile) throws IOException, RecognitionException {
 
-    lexer = new smaliFlexLexer(reader);
-    ((smaliFlexLexer)lexer).setSourceFile(smaliFile);
-    tokens = new CommonTokenStream((TokenSource) lexer);
+        // copy our filestream into a tmp file, so we don't overwrite
+        File tmp = File.createTempFile("BRUT",".bak");
+        tmp.deleteOnExit();
 
-    if (printTokens) {
-      tokens.getTokens();
+        OutputStream os = new FileOutputStream(tmp);
+        IOUtils.copy(is, os);
+        os.close();
 
-      for (int i=0; i<tokens.size(); i++) {
-        Token token = tokens.get(i);
-        if (token.getChannel() == smaliParser.HIDDEN) {
-          continue;
+        return assembleSmaliFile(tmp,dexBuilder, verboseErrors, printTokens);
+    }
+
+    public static boolean assembleSmaliFile(File smaliFile,DexBuilder dexBuilder, boolean verboseErrors,
+                                            boolean printTokens) throws IOException, RecognitionException {
+
+        CommonTokenStream tokens;
+        LexerErrorInterface lexer;
+
+        InputStream is = new FileInputStream(smaliFile);
+        InputStreamReader reader = new InputStreamReader(is, "UTF-8");
+
+        lexer = new smaliFlexLexer(reader);
+        ((smaliFlexLexer)lexer).setSourceFile(smaliFile);
+        tokens = new CommonTokenStream((TokenSource) lexer);
+
+        if (printTokens) {
+            tokens.getTokens();
+
+            for (int i=0; i<tokens.size(); i++) {
+                Token token = tokens.get(i);
+                if (token.getChannel() == smaliParser.HIDDEN) {
+                    continue;
+                }
+
+                System.out.println(smaliParser.tokenNames[token.getType()] + ": " + token.getText());
+            }
         }
 
-        System.out.println(smaliParser.tokenNames[token.getType()] + ": " + token.getText());
-      }
+        smaliParser parser = new smaliParser(tokens);
+        parser.setVerboseErrors(verboseErrors);
+
+        smaliParser.smali_file_return result = parser.smali_file();
+
+        if (parser.getNumberOfSyntaxErrors() > 0 || lexer.getNumberOfSyntaxErrors() > 0) {
+            return false;
+        }
+
+        CommonTree t = (CommonTree) result.getTree();
+
+        CommonTreeNodeStream treeStream = new CommonTreeNodeStream(t);
+        treeStream.setTokenStream(tokens);
+
+        smaliTreeWalker dexGen = new smaliTreeWalker(treeStream);
+
+        dexGen.setVerboseErrors(verboseErrors);
+        dexGen.setDexBuilder(dexBuilder);
+        dexGen.smali_file();
+
+        return dexGen.getNumberOfSyntaxErrors() == 0;
     }
-
-    smaliParser parser = new smaliParser(tokens);
-    parser.setVerboseErrors(verboseErrors);
-
-    smaliParser.smali_file_return result = parser.smali_file();
-
-    if (parser.getNumberOfSyntaxErrors() > 0 || lexer.getNumberOfSyntaxErrors() > 0) {
-      return false;
-    }
-
-    CommonTree t = (CommonTree) result.getTree();
-
-    CommonTreeNodeStream treeStream = new CommonTreeNodeStream(t);
-    treeStream.setTokenStream(tokens);
-
-    smaliTreeWalker dexGen = new smaliTreeWalker(treeStream);
-
-    dexGen.setVerboseErrors(verboseErrors);
-    dexGen.setDexBuilder(dexBuilder);
-    dexGen.smali_file();
-
-    return dexGen.getNumberOfSyntaxErrors() == 0;
-  }
 }