Lost Install/No download/Steam code?

[jamiewhite]

I bought the Penumbra collection itself from the Frictional games website I believe many a year ago. In fact, I can say it was almost exactly 10-31-2011 because I posted a thread on my purchase not working xD
What I'm now wondering, as I want to play through again: How on earth do I install this and where on earth are my install files?
There's no obvious way to redownload them and the HDD I had with everything back up has long since bitten dust.
Can I reclaim these games on my steam account? That'd be great as I have the Amnesia games on there.
I'm completely stumped as to what to do.
Any help would be greatly appreciated Smile