I've used a manual method that seems to work - you simply select the number of files somewaht similar to the number of deleted files in the MFT.
Open a CMD prompt and enter:
For /L %i in (1,1,5000) do fsutil file createnew recuva%i.tmp 1024
change the 5000 for the number of files that you want, the recuva to whatever name you want (xyz.tmp) and 1024 to the size of the file that you want in bytes. Make sure to switch to the directory you want to create the temporary files in - such as c:\temp.
I did the above with 80,000 files and Recuva hasn't found any entries for typically deleted files such as pictures, etc.
