diff --git a/btree.cpp b/btree.cpp
index 75c5dd0..e0a7163 100644
--- a/btree.cpp
+++ b/btree.cpp
@@ -8,6 +8,18 @@
   return;
 } // bTree::bTree
 
+int
+bTree::align(int keyLength) {
+  return ((sizeof(uPtr) + keyLength + 7) >> 3) << 3;
+} // bTree::align
+
+void
+bTree::InstallUserFunctions(compareKeyFunc cmpFunc, copyKeyProc copyProc, keySizeFunc ksFunc) {
+  compareKey = cmpFunc;
+  copyKey = copyProc;
+  keySize = ksFunc;
+} // bTree::InstallUserFunctions
+
 bTree::~bTree(void) {
   return;
 } // bTree::~bTree
diff --git a/btree.h b/btree.h
index 4226d1a..777ce56 100644
--- a/btree.h
+++ b/btree.h
@@ -58,15 +58,18 @@
 
 class bTree {
  protected:
-  compareKeyFunc compareKeys;
+  compareKeyFunc compareKey;
   copyKeyProc    copyKey;
   keySizeFunc    keySize;
   bTreeInfo *    info;
   bTreeVFS *     vfs;
   bool           memoryTree;
   bool           treeChanged; 
+
+  int      align(int);
  public:
            bTree(char *, uInt32, treeTypes, bTreeVFS *);
+  void     InstallUserFunctions(compareKeyFunc, copyKeyProc, keySizeFunc);  
   virtual ~bTree(void);
 };// bTree