Work beautifully thank to Dhrup and his ht skills.  Thank you very much for the help.  Only I place ht code at the top of rewrite instead of buttom.

RewriteRule ^tag/(.+)/?$ engine/handlers/pagehandler.php?handler=search&page=$1
RewriteCond %{THE_REQUEST} !.*search.* [NC]
RewriteRule ^([a-zA-Z0-9_-]+)$ pg/profile/$1
RewriteRule ^([a-zA-Z0-9_-]+)/$ pg/profile/$1
</IfModule>

But it will still fail if I have simple cache enabled, and we are awaiting a plugin from Dhrup that will do it all via smarts in php coding.

So is this the final answer....  I'm dizzy from jumping around to all the different pages that reference this issue. :-)

@Dhrup.De.Scoop  Muchas gracias por todo. 

TIA :-)

Is there also a possibility to hide username in url, because i am using profile manager and set login with email, and this creats the username from the email, and no one would show his own email. sorry for my english i hope u understand what i mean. thx!

How to do this in Elgg 1.8?

How to do mydomain.com/username for elgg 1.8.8 PLEASE HELP Experts !!!

It still amazes how such an old, old topic gets revived again and again and oftentimes
with different authorship claims ;-)

This htaccess trick which dates back to Mar 14 2009 in the Elgg Google Groups :-
http://groups.google.com/group/elgg-users/tree/browse_frm/month/2009-03/cf6e5dd1da34e6b3?rnum=181&_done=%2Fgroup%2Felgg-users%2Fbrowse_frm%2Fmonth%2F2009-03%3F

and has been written about also by Jeroen Dalsem :-
http://community.elgg.org/pages/view/85534/redirect-to-profile-with-htaccess

and recently got mention yet again
http://community.elgg.org/discussion/view/1066012/short-url-with-profile-name-with-htaccess

seems to have resurfaced yet again ! (Talk about lackof originality?)
and this time as a fully blown plugin that requires you to download
a whole separate but absolutely unrelated "framework" to make it work LOLZ ;-P

And the total amount of code needed is ONLY 1 LINE on the htacess file ! tee hee !;-X
with one little big problem - there was an issue with conflicts with Elgg keywords --
which BREAKS your whole entire site while using this htaccess trick -
that this so-called "new" plugin does not address at all  anyway.
So - go ahead and make your day! Download mucho nuevo plugin, install
and then... wait for certain key Elgg functionality to break on your site ;-)

@DhrupDeScoop thank you for the digging this old topic and bringing to the front :) see my latest reply here . Please HELP :)

What exactly are ya lookin for matey ?
*always asking fer "HELP... BRO" ?