Can I do that? I unzipped the folder and the auto-install put the whole site into /html/silverstripe-v2.0.2b - so all my links would be: http://www.mydomain.com/silverstripe-v2.0.2b/about-us, etc - can I move all the files out of that silverstripe-v2.0.2b folder and into my main /html folder?
yeah, you can copy it, or you can play with mod_rewrite in the main folder, maybe something like
## Directory CRM is not in SilverStripe
RewriteRule ^CRM$ - [L]
RewriteRule ^CRM/.* - [L]
## All other to SS
RewriteRule ^(.*)$ silverstripe/$1 [L,QSA]