questions before switching from cvs to svn

Dear svn users,
before eventually switching from cvs to subversion, I would like to know a
little bit more about the following issus:

* big databases & incremental backups
It seems to me, that all files are stored in one big database, so every
commit changes a few big files. Since we are using frequent incremental
backups (once per hour), we would like to avoid such architecture.
Using one repository per project could be a solution, but I prefer only one
repository for all projects.

* RW and RO access
In our cvs-repository we use POSIX-ACLs, that allows us to distinguish
read-only and read-write access for each project and each user.
In the FAQ-list (http://subversion.tigris.org/project_faq.html#readonly)
it seems to me, that this is not possible with subversion, is this correct?

* GUI for Windows
I would like to install TortoiseSVN for our Windows-users, but I've no
success. Neither errors, nor warnings when installing on Windows 2000, but in
the menu, there is only TortoiseMerge, but no TortoiseSVN. Nothing to see
in the explorer neither. Am I missing some point of the installation?

Thanks in advance for any hints!
Cheers, Peter

-- 
http://pmrb.free.fr/contact/
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