Paradox 4.0 will run in DOSBox with just a standard setup as described in the DOSBox README and documentation. The only thing to remember is that in addition to your Paradox software, you have to also mount your data folders to drives.
Note that I haven't tried to print from Paradox to paper (I don't use paper reports, I export to ASCII or save as CSV and that works fine). Since Paradox expects printers are connected to either Parallel ports (LPT) or Serial ports (COM) and few Windows 7 systems have either, getting print-to-paper to work might take some figuring out.
Sojourner 00:17, 8 November 2012 (UTC)