Dreamhost doesn't really support slashcode. This is for several reasons; mainly that it requires mod_perl (which we like, and use for a lot of internal stuff, but which doesn't scale well to a shared hosting environment) and a LOT of Perl modules etc. It's also fairly server intensive. Unless your needs are very large scale (in which case you might check out www.dreamservers.com) we'd recommend phpnuke or 'nope'. Also, I believe some people are running PHP Slashcode, although I'm not 100% sure this works on our system. I know for sure that Nuke works pretty well on our system.