How can I convert PSpice model into LTSpice Model?
When you download the files, you see that these is just basic .lib files which any spice simulator can handle. There is no conversion needed.

Here is a good youtube video by LT which shows you how to import and use a third party model. The part of the video you would be interested in starts at around 7:12

https://youtu.be/ajcYYwoHF0g?t=7m12s