Brain Teaser... Script Required..

hv a system which have two folders in my c: drive. Now these folders hv some set of files and other folders . Now i want to design s batch file or a windows scripting file which can do the following thing
Let me explain it again.

I hv two main folders in myhdd .Those folders contains many othe folders and files. and each folder itself contain many other files and folders. Now what io hv to create a new folder which will contain the these two folders and all the folder and unique files of each folder.


lets say folder1 has three folders aa bb and cc ,dd

--->aa has files 11 ,22,33
---->bb has files xx,yy,zz
---->cc has files xxx,yyy,zzz


lets say folder 2 has three folders aa bb and cc ,ee

--->aa has files 11 ,222,333
---->bb has files xx,yy,zzz
---->cc has files xxx,yyyy,zzzz


now the final folder

folder12 should hv folders aa,bb,cc,dd,ee

aa should hv ---> 11,22,33,333,222
bb should hv ---> xx,yy,zz,zzz
cc should hv ---> xxx,yyy,zzz,yyyy,zzzz




If i m correct we hv to design a recursive script...



i m very...very... confused ...



Plz help me

I appreciate every bit of help..

Four assumptions:

1. It doesn't matter if files with matching filenames are overwritten.
   
2. Folder "folder12" already exists.
   
3. You are at the DOS prompt in the parent directory of all threee folders, ("folder1", "folder2" and "folder12").
   
4. Windows XP's XCOPY and FOR commands work the same as they did in Windows 9x/Me.

The DOS command to use then would be:

• for %%x in (1 2) do xcopy folder%%x\*.* folder12 /s