Java Development Tools

I have a few queries regrading SVN plugin in JDeveloper,
I am working with JDev 10.1.3.4. And hv SVN along with it.
Also apart from this I had an Tortoise SVN client in my system-
version TortoiseSVN 1.4.8, Build 12137 - 32 Bit
Subversion 1.4.6

the SVN repository is not in the local System. It is on a separate server

1) While downloading the updates i dint find the VCS framework extension. Is it necessary that I find it and download that also? Currently I do not have that.

2) When I import an app from JDev to the SVN repo, the following 2 folders get created
Application1.svn-import-backup
Application1.svn-import-workarea1
Are these necessary?
Can I just delete them?

3) How does the locking mechanism work here? I came to know before locking a file to commit it, I have to obtain a lock svn lock command. Does the same thing continue with Jdev 10.1.3.4 also?

4) This one is wierd, I create a connection to SVN using a username and password. So, while committing it thro' Jdev, I dont hv to provide authentication agn. But if i checkout the same app outside outside the 'mywork' and try to commit it, It still does not ask for authentication and password. It used to, previously.


-Shri