I just played around with the linkx import function and got it to import everything I wanted it to using the following format without the need to change anything:
email address | site url | recip url | description | title | submitter ip address | keywords | clicks | weight | submitter name | admin comments | category
Note: No spaces between the '|' I spaced it to make it easier to see.
If using sub cats, add the category like this example. Big Dicks/Big Dicks Movies.
Remember this works for me during testing. Always make sure it works for you before mass importing anything
Once you have imported links in this format always use it and linkx will remember the format so you don't have to set the options each time you do an import.
"Other settings" field at the bottom of the import page does not need to be changed from the test imports I have made.