KHPro 2.009 was released in August, 2001. That's a LOOOONG time ago.
You should be able to run KHP 2.009 from Microstudio 3.004. If not, you can run it outside of Microstudio just fine, create your CDG songs, then use them in Microstudio. There are some slight benefits to having everything integrated, but not required.
As ddouglass suggested,
read the upgrades from 2.009 to 4.105.
There has been a lot of improvements... 66 changes in all. 2.009 is quite primative by today's standards. I expect you would turn out better songs, faster and be happier doing them with 4.105.
