Can I use some of the original EQ2 windows? the rest of ProfitUI windows are awesome
 

There is half of the Profit UI I really like and half of the Profit UI I really do not like.

How can I use the original EQ2 experience bar, group window, and player window. The original EQ2 player window that the ProfitUI "Show Player Window" replaces.

I love the rest of the ProfitUI.

Thanks for reading and I appreciate the help.

I'm not an expert with ui's but if you go into your program files > sony > everquest2 > UI > ProfitUi folder there are all your .XML files for each interface used in the game. Just delete which windows you want to revert back to the original eq2 file and you should be set. For example, if you wanted to have the original eq2 clock you would erase the file eq2ui_mainhud_clock where clock is the actual piece you are erasing. When you reload your eq2 client it should show your default clock.

Yeah, I've tried that with the experience bar. Doesn't work. :(

It will work, just delete the files, it will then use the Default UI for those windows.

Which files should I delete?

You would delete:
eq2ui_mainhud_experience.xml
eq2ui_mainhud_groupmembers.xml
eq2ui_mainhud_player.xml