After a little googling, I think the Pentax Remote Assistant is not compatible with the K200D.
Sorry to get your hopes up.
The Pentax Remote Assistant though was compatible with the *istD upto the K10D and K20D.
I wonder why it skipped the K200D when there was a Pentax Remote Assistant 3 for the K20D.
The first version of the PRA works on my K100D super as I have it installed in my laptop.
There are some users reporting the Pentax Remote Assistant 1 working, but not 100% or erratically with the K200D.
You might want to try it.
You can get the Pentax Remote Assistant 1 on the Pentax site itself.
Sorry again for getting your hopes up.