Hot shoe adapter

You did the right thing! I'm constantly bemused by the countless threads about the difficulties of using the latest flashes, studio flashes are always manual and generally more powerful. Why? Because they give YOU control over what you are trying to achieve and the subtleties you can achieve by tiny adjustments are endless.

You've got the stand now you need a couple of more things... first get a powerful manual studio head, you can get good enough cheap ones from China on ebay - I have a couple. Then perhaps a softbox and a white/black brolly. Next you need another stand, hey wait! You've got that broken tripod and you can clamp a relfector holder to it with a 32cm black/white/gold/silver reflector and now you are in serious business and spending less than you would on a new Pentax flash.

How you trigger the flash will depend on what camera you are using. Which is it?

I'm doing some shots on Saturday in my hall at home - I'll post pics of the set-up if you like.

Depends on what you want to use though, if you want to use umbrellas, softboxes and other adapters you need something a bit more complicated.
Some shop as above link

I've bought for myself a complete kit a week ago this one link and instead of 43" umbrella a 60" and an reflector.

You might love these guys, they also show their kit on the site link

imagesteve: thanks. But have already bought a new lighting stand from ebay. Quite a good price. will bear in mind your suggestion, should I expand and need a 3rd light ( built-in and 2 off-camera)..