I need a region free DVD player

[JFC]

That's the thing I went to what you and JFC suggested, and i found Zip.

Post what your DVD player make/brand and model number are.

 

[Kivat]

Memorex

Model: MVD2040-BLK

and

Panasonic

Model No. SA-HT730

 

[JFC]

Memorex

Model: MVD2040-BLK

You probably got thrown off with this one because you added the "BLK" (which isn't actually part of the number code, but simply refers to the colour of the machine) at the end of the model number. Try this one:
http://www.videohelp.com/dvdhacks/memorex-mvd-2040/7342

Panasonic

Model No. SA-HT730

Doesn't look like anyone has found/posted any hack codes for the HT730. Closest they have is for the HT-720. You can probably give it a try. Since the model numbers are so similar, there would only be minute differences between them, so the same code might work.
http://www.videohelp.com/dvdhacks/panasonic-sa-ht720/6695


Now remember that when you're doing these hack codes, they don't always work the very first time to try them. If it doesn't work the first time, wait a few minutes and then try again, making sure to follow the steps exactly as they're shown on the webpage. Sometimes you have to input the codes a few times in order for them to work.

And if worse comes to worse, you can always just use your computer's DVD-ROM, since they're all designed to be region-free.