Name:  Gangsters

Run regedit from Start-Run.
Type regedit and press enter.

Navigate through the following:
"HKEY_LOCAL_MACHINE" => "SOFTWARE" => "HOTHOUSE" => "GANGSTERS"

Change the TAG:
"DEFAULT_MONEY"

Put in any Number you like...

Now  start a new Game and the "NUMBER"
you give in, is now the money in your safe.