to those who have been following up this thread and waiting for some answer(don't know if there is any of you tho) 
after a couple of search, i found the answers myself.
About spam message from adium, you can simply fix it by: Adium menu > Privacy Settings > *select account, or simply "All"* > Privacy level: Allow only contacts on my contact list.
and apparently there is still no solution to the slow transfer rate with adium on msn protocol.
i think i am getting fairly good with mac and i am so used to it that when i go back to PC i and finding myself pressing cmd+w!!! lol.. i will try to answer any new comers question here so we both can learn something new..
after a couple of search, i found the answers myself.
About spam message from adium, you can simply fix it by: Adium menu > Privacy Settings > *select account, or simply "All"* > Privacy level: Allow only contacts on my contact list.
and apparently there is still no solution to the slow transfer rate with adium on msn protocol.
i think i am getting fairly good with mac and i am so used to it that when i go back to PC i and finding myself pressing cmd+w!!! lol.. i will try to answer any new comers question here so we both can learn something new..