Migrating categories from Radio Userland

I'm familier with setting a brand new PyDS account, 
but have a few questions/confirmations regarding
migrating to a PyDS account [on PyCS.net].

a. Can I use my existing usernumber 
I think so, as there is the option in the setup to use
an existing account.

b. Will my exisitng subdomain & subfolder remain
intact?
Are the PyCS features a shortname subdomain and
subfolder (in my case, sqr.pycs.net, pcys.net/sqr)
simply a case of mapping?

c. Can PyDS use my existing 'categories' folder
scheme?
http://www.pycs.net/sqr/categories/slicesOfPy/2003/10/07.html#a170
(I've read the doc's enough to know that I need to
select "User Radio Userland folder types", but I'm not
sure how the subcategory creation works.)

Thanks in advance,

Dean

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/