how to change url discussions/mine ??

After I take a look at http://vanillaforums.org/discussion/13226/change-discussions-url-name/

It gave me some idea to change url about this vanilla forums.

1. Im able to change my url homepage which is the default is http://gudangartikel.net/discussions then become http://gudangartikel/artikel.

2. Im able to change my url post discussions which is the default is http://gudangartikel.net/discussion/44/pantai-terindah-di-pulau-dewata became http://gudangartikel.net/topik/44/pantai-terindah-di-pulau-dewata

to make the url changes like above, so far i just add this code to my .htaccess
RewriteRule ^discussions(.*)$ /artikel$1 [R,L]
RewriteRule ^artikel(.*) index.php\?p=discussions$1 [PT,L]
RewriteRule ^discussion/(.*)$ /topik/$1 [R,L]
RewriteRule ^topik(.*) index.php\?p=discussion$1 [PT,L]
RewriteRule ^discussions/mine(.*)$ artikel/saya$1 [R,L]
RewriteRule ^artikel/saya(.*) index.php\?p=discussions/mine$1 [PT,L]

My question is, how to change the url discussions/mine ?
until this time if I put code .htaccess like above, the discussions/mine url became artikel/mine

actually I wanna change the url discussion/mine become artikel/saya.
Is there anything wrong with my .htaccess?