[Samsung Galaxy Mega] Kangburra:
As I said there is nothing to stop you de-odexing the ones you need.

Disassembling SecEmail_J.odex ...
java -Xmx512m -jar baksmali.jar -a 17 -d ../framework -x SecEmail_J.odex
Error while disassembling method Lcom/android/email/activity/setup/AccountSettingsHtmlSignature$4;->onHitResult(Ljava/lang/String;)V. Continuing.
org.jf.dexlib.Code.Analysis.ValidationException: The V type can only be used as a method return type
at org.jf.dexlib.Code.Analysis.RegisterType.getRegisterTypeForType(RegisterType.java:185)
at org.jf.dexlib.Code.Analysis.RegisterType.getRegisterTypeForTypeIdItem(RegisterType.java:211)
at org.jf.dexlib.Code.Analysis.MethodAnalyzer.analyzeMoveResult(MethodAnalyzer.java:1727)
at org.jf.dexlib.Code.Analysis.MethodAnalyzer.analyzeInstruction(MethodAnalyzer.java:674)
at org.jf.dexlib.Code.Analysis.MethodAnalyzer.analyze(MethodAnalyzer.java:213)
at org.jf.baksmali.Adaptors.MethodDefinition.addAnalyzedInstructionMethodItems(MethodDefinition.java:389)
at org.jf.baksmali.Adaptors.MethodDefinition.getMethodItems(MethodDefinition.java:311)
at org.jf.baksmali.Adaptors.MethodDefinition.writeTo(MethodDefinition.java:132)
at org.jf.baksmali.Adaptors.ClassDefinition.writeMethods(ClassDefinition.java:338)
at org.jf.baksmali.Adaptors.ClassDefinition.writeVirtualMethods(ClassDefinition.java:310)
at org.jf.baksmali.Adaptors.ClassDefinition.writeTo(ClassDefinition.java:117)
at org.jf.baksmali.baksmali.disassembleDexFile(baksmali.java:186)
at org.jf.baksmali.main.main(main.java:308)
opcode: move-result
CodeAddress: 35
Method: Lcom/android/email/activity/setup/AccountSettingsHtmlSignature$4;->onHitResult(Ljava/lang/String;)V

Error while disassembling method Lcom/android/email/activity/setup/AccountSettingsHtmlSignature$4;->onIsSAMMFile(Ljava/lang/String;)Z. Continuing.
org.jf.dexlib.Code.Analysis.ValidationException: The V type can only be used as a method return type
at org.jf.dexlib.Code.Analysis.RegisterType.getRegisterTypeForType(RegisterType.java:185)
at org.jf.dexlib.Code.Analysis.RegisterType.getRegisterTypeForTypeIdItem(RegisterType.java:211)
at org.jf.dexlib.Code.Analysis.MethodAnalyzer.analyzeMoveResult(MethodAnalyzer.java:1727)
at org.jf.dexlib.Code.Analysis.MethodAnalyzer.analyzeInstruction(MethodAnalyzer.java:674)
at org.jf.dexlib.Code.Analysis.MethodAnalyzer.analyze(MethodAnalyzer.java:213)
at org.jf.baksmali.Adaptors.MethodDefinition.addAnalyzedInstructionMethodItems(MethodDefinition.java:389)
at org.jf.baksmali.Adaptors.MethodDefinition.getMethodItems(MethodDefinition.java:311)
at org.jf.baksmali.Adaptors.MethodDefinition.writeTo(MethodDefinition.java:132)
at org.jf.baksmali.Adaptors.ClassDefinition.writeMethods(ClassDefinition.java:338)
at org.jf.baksmali.Adaptors.ClassDefinition.writeVirtualMethods(ClassDefinition.java:310)
at org.jf.baksmali.Adaptors.ClassDefinition.writeTo(ClassDefinition.java:117)
at org.jf.baksmali.baksmali.disassembleDexFile(baksmali.java:186)
at org.jf.baksmali.main.main(main.java:308)
opcode: move-result
CodeAddress: 17
Method: Lcom/android/email/activity/setup/AccountSettingsHtmlSignature$4;->onIsSAMMFile(Ljava/lang/String;)Z

ERROR: Aborting SecEmail_J.odex

but the whole Rom can't be done at the moment.