ahhh another sucker, astrophotography with a dob!
Welcome to my world
I'm not alone anymore!
That's a great first start, well done!
I think you have to save them as bmp's from the LPI software to be able to load them in registax.
I'm not sure what the LPI software does to improve the image.. but in registax, you can use the wavelets tab to adjust layer 2 normally, and then in photoshop you could try a little unsharp mask and despeckle.
Good luck on this slippery slope!