diff --git a/headers/os/support/StringList.h b/headers/os/support/StringList.h
index dba5edf70a..c067d3c5fe 100644
--- a/headers/os/support/StringList.h
+++ b/headers/os/support/StringList.h
@@ -7,11 +7,12 @@
 
 
 #include <BeBuild.h>
+#include <Flattenable.h>
 #include <List.h>
 #include <String.h>
 
 
-class BStringList {
+class BStringList : public BFlattenable {
 public:
 								BStringList(int32 count = 20);
 								BStringList(const BStringList& other);
@@ -25,6 +26,8 @@ public:
 
 			bool				Remove(const BString& string,
 									bool ignoreCase = false);
+			void				Remove(const BStringList& list,
+									bool ignoreCase = false);
 			BString				Remove(int32 index);
 			bool				Remove(int32 index, int32 count);
 			bool				Replace(int32 index, const BString& string);
@@ -59,6 +62,15 @@ public:
 			bool				operator==(const BStringList& other) const;
 			bool				operator!=(const BStringList& other) const;
 
+	// BFlattenable
+	virtual	bool				IsFixedSize() const;
+	virtual	type_code			TypeCode() const;
+	virtual	bool				AllowsTypeCode(type_code code) const;
+	virtual	ssize_t				FlattenedSize() const;
+	virtual	status_t			Flatten(void* buffer, ssize_t size) const;
+	virtual	status_t			Unflatten(type_code code, const void* buffer,
+									ssize_t size);
+
 private:
 			void				_IncrementRefCounts() const;
 			void				_DecrementRefCounts() const;
diff --git a/headers/os/support/TypeConstants.h b/headers/os/support/TypeConstants.h
index 67cd0de4a6..9272b04cdf 100644
--- a/headers/os/support/TypeConstants.h
+++ b/headers/os/support/TypeConstants.h
@@ -52,6 +52,7 @@ enum {
 	B_SIZE_T_TYPE					= 'SIZT',
 	B_SSIZE_T_TYPE					= 'SSZT',
 	B_STRING_TYPE					= 'CSTR',
+	B_STRING_LIST_TYPE				= 'STRL',
 	B_TIME_TYPE						= 'TIME',
 	B_UINT16_TYPE					= 'USHT',
 	B_UINT32_TYPE					= 'ULNG',
diff --git a/src/kits/support/StringList.cpp b/src/kits/support/StringList.cpp
index 9e0dc8ce22..10c196ef3e 100644
--- a/src/kits/support/StringList.cpp
+++ b/src/kits/support/StringList.cpp
@@ -5,6 +5,7 @@
 
 
 #include <StringList.h>
+#include <TypeConstants.h>
 
 #include <algorithm>
 
@@ -126,6 +127,14 @@ BStringList::Remove(const BString& string, bool ignoreCase)
 }
 
 
+void
+BStringList::Remove(const BStringList& list, bool ignoreCase)
+{
+	for (int32 i = 0; i < list.CountStrings(); i++)
+		Remove(list.StringAt(i), ignoreCase);
+}
+
+
 BString
 BStringList::Remove(int32 index)
 {
@@ -233,16 +242,16 @@ BStringList::IndexOf(const BString& string, bool ignoreCase) const
 		for (int32 i = 0; i < count; i++) {
 			BString element(StringAt(i));
 			if (length == element.Length() && string.ICompare(element) == 0)
-				return true;
+				return i;
 		}
 	} else {
 		for (int32 i = 0; i < count; i++) {
 			if (string == StringAt(i))
-				return true;
+				return i;
 		}
 	}
 
-	return false;
+	return -1;
 }
 
 
@@ -311,6 +320,76 @@ BStringList::operator==(const BStringList& other) const
 }
 
 
+bool
+BStringList::IsFixedSize() const
+{
+	return false;
+}
+
+
+type_code
+BStringList::TypeCode() const
+{
+	return B_STRING_LIST_TYPE;
+}
+
+
+
+bool
+BStringList::AllowsTypeCode(type_code code) const
+{
+	return code == B_STRING_LIST_TYPE;
+}
+
+
+ssize_t
+BStringList::FlattenedSize() const
+{
+	ssize_t size = 0;
+	for (int32 i = 0; i < CountStrings(); i++) {
+		const char* str = StringAt(i).String();
+		size += strlen(str) + 1;
+	}
+
+	return size;
+}
+
+
+status_t
+BStringList::Flatten(void* buffer, ssize_t size) const
+{
+	if (size < FlattenedSize())
+		return B_NO_MEMORY;
+		
+	for (int32 i = 0; i < CountStrings(); i++) {
+		const char* str = StringAt(i).String();
+		ssize_t storeSize = strlen(str) + 1;
+		memcpy(buffer, str, storeSize);
+		buffer = (void*)((const char*)buffer + storeSize);
+	}
+	
+	return B_OK;
+}
+
+
+status_t
+BStringList::Unflatten(type_code code, const void* buffer, ssize_t size)
+{
+	if (code != B_STRING_LIST_TYPE)
+		return B_ERROR;
+		
+	const char* str = (const char*)buffer;
+	for (off_t offset = 0; offset < size; offset ++) {
+		if (((int8*)buffer)[offset] == 0) {
+			Add(str);
+			str = (const char*)buffer + offset + 1;
+		}
+	}
+
+	return B_OK;
+}	
+
+
 void
 BStringList::_IncrementRefCounts() const
 {