multi-tabling questions (first of all how do you do it ?)

hi guys, im sure a lot of u play 4 tables and stuff at a time....
i actually only play max 2, mostly only 1 table

i been playing party poker 200nl 6-max for last two months. here are my stats form Ptracker for 200nl:

mt ratio: 1.22
20,626 hands
13.37ptBB/hr
win rate = $53.50

what i am wondering is whether or i not should be multi-tabling. i am obviously a solid player but i feel like my game suffers the more tables i open. i have been playing 2 tables of late, but I only play one if im having a slightly bad run.

i was intrigued by multi-tabling when someone had posted some multi-table stats which showed sthem making 75$/hr while only making 5ptBB/hr a table. I make dbl that, yet i make 25$ less an hr.

the reason why i am aksing is becuz i am semi-professionally:i live exclusively off my earnings. ( i live at home, so no rent) I want to make more $ so if im playing 1-2 tables... ill have to go up to 400nl 6-max(party).

are the players at 400nl still soft? I rather play in lukewarm environment than a rabid shark tank. my playing BR right now is about 10,0000 so i rather not risk it at 400nl

so if i should bet multitabling... what are the pros and cons. how do u guys manage all those screens. I have two screens and i cant stand having more than one table open up on one. do u guys have a particular technique or do u get used to it.

I think playing 6-max changes things too becuz ull be playing more hands at once if ur multi-tabling. hence why i put this in 6-max post.