php extensions requirements for Virtuemart

[dylanjh]

Hi Everyone,
Im trying to find out what virtuemart (2.0.20b) requirements are in terms of PHP extensions. E.g. Does it need the gd extensions? bzip?
I found reference to a page that used to exist in the references of this wikipedia page: http://en.wikipedia.org/wiki/VirtueMart. It even gives a list itself, but implies its not complete.
Ive also checked http://docs.virtuemart.net/tutorials/34-development/83-setting-up-a-development-environment.html but it doesnt deal with setting up the server itself.
So I can see that it needs at least:
XML and ZLIB
But can anyone tell me if anything is needed? or point me in a direction where I can find out?
Thanks
Dylan