cp- cannot start
 

# Assuming your forum is located in /home/vbulletin/public_html, Also you must define where your sphinx folder is located (different depending on where you ran the above commands). Then use this command:
cp /path/to/sphinx-0.9.8/api/sphinxapi.php /home/vbulletin/public_html/packages/vbsphinxsearch

dear sir when i entered above command message is cp cannot start?

could you guide me what is the error

Your vBulletin installation is located in /home/vbulletin/public_html? Did cp return you an error message?

The file you're copying is located in the source of sphinx, the place you were using to build the binaries...

You need to actually input your own path in here:

My forum statics is here

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If I install this mod any page loading speed improve?

Doubtful you will notice a thing. This is from the announcement:

I disagree with the announcement. If you're willing to put the time into installing it and don't have tons of free memory to spare on MySQL, you will still see the reward on smaller sites.

I doubt it'll be all that significant server side, but it will take a nice chunk out of search times, especially for common words. It might also mean you can hold off of upgrading your server for a while, as the usual search related reasons to (locking, slow searches, etc.) will never occur.