Hey riskreward,
You did right way and you will not loose search engine traffic
But you wanted to redirect all urls from old urls to new urls then copy all old ULRs
and using this code
Code:
RewriteRule old_url new_url [L,R=301]
then when someone clicks your links on search engine rusults (for old ULRs) then they will be redirected to new URLs as you declared in your htaccess file.
You can read more about how to redirect urls using htaccess.
http://www.webmastersun.com/threads/...n-in-Wordpress
http://www.webmastersun.com/threads/...at-is-advanced
http://www.webmastersun.com/threads/...-htaccess-file
Hope it helps!