The file permissions should be 0777 not 7777
And your not going to really be able to modify the files being presented on the HTTPd,
Unless you find a exploit.
Not 100% sure if you need a Squid proxy to handle the request on the hosts end though,
But shouldn't be to hard to configure.
Read up on "-D" option in the manual pages for SSH.
Hmm,
Judging by the English used in the first post I'm presuming he's not a webmaster and the above info will just confuse him even more..
He looks to be a end user not a webmaster ;) (Personnel observation)
Setup a Squid proxy onto the host,
Then tunnel your traffic through the port Squid uses.
Configure Firefox to use a SOCKS tunnel.
Don't login as root either,
Create some more accounts for public use.