[sdiy] new CD / copyright for cover art

[jhaible at debitel.net]

Ok, this is slightly off topic, so please let's not start a big discussion,
but if anybody _knows_ this stuff, I'd be glad to get some info:

I have finished recording my 3rd CD "Holiday in Purgatory", and
I'm going to make the cover art now. I'd love to use something based on
a Hieronymus Bosch painting. It's easy to find that on the web.
How is the copyright situation? I would certainly not just use a picture
as I find it, but alter it it in paintshop to fit my needs. Would this=20
infringe any copyrights?

Thanks in advance,

JH.