need help with mining

hi guys
i made a thread earlier about which mining rig to buy.
i have bought ati 6990 and a good motherboard etc...

installed ubuntu on it and followed this guide: http://forum.bitcoin.org/?topic=7514.0

Quote

first, i had problem with step 16: svn checkout http://svn3.xp-dev.com/svn/phoenix-miner/trunk
i got this error or message:
svn: OPTIONS of 'http://svn3.xp-dev.com/svn/phoenix-miner/trunk': Could not read status line: Connection reset by peer (http://svn3.xp-dev.com)

now this is fixed... i followed the guide and everything went good.. but i couldn't see my gpu in terminal. so i did research and found out sdk 2.1 dont support 6990.
im trying to install sdk 2.4, but in terminal it dont work and manual i dont get permission.

second, i have no idea how to start mining with my 6990 and what other steps i have to take other then what the guide explains.

any help is very appreciated.
thanks