Okay guys, i got it all working.
So, install VisualSVN. Bbelieve me or not i installed 2.0.8 and after few hours got a message from RSS there is new version - 2.1, so i made an update (at least was able to check the update process, all went just fine).
Then install Ruby (i got 1.8.6), then Gems (1.3.1 is req, but i got 1.3.5)
When you got Ruby and gems, enter cmd and enter: gem install rails -v=2.3.5
then: gem install rack -v=1.0.1
then i got latest Redmine trunk.
Installed MySQL 5.0 (5.1 is not supported), create new DB (via shell or gui tools), redmine user and it's privileges.
Then: gem install mysql
+ copy http://instantrails.rubyforge.org/svn/trunk/InstantRails-win/InstantRails/mysql/bin/libmySQL.dll to ruby/bin
edit config file for redmine and run rack webserver... al should be working.
I had one problem, i was not able to see the repository in newly created redmine project.
Solution - redmine.org/boards/2/topics/show/723
Mine config looks like: SVN_BIN = "svn --trust-server-cert --non-interactive --config-dir c:/Repositories"
So now all is working. My next step, move svn repo from ald pc to that new.
Done :)