Hey shellyd!
There is no difference to the charts based on the limits you play. They have been developed so that you play a +EV game when playing these hands in the given positions as you have an equity edge v a TAG range. Of course, the higher the limit the more correctly your opponents will play so the edge becomes less - but at micro limits I wouldn't worry too much about adjusting your ranges and I'd just stick to the charts.
As for short handed (SH) charts (ie 6max games v FR/9-10max), the charts are in this silver article here.
In terms of getting to grips with how loose/tight your opponents are playing whilst multi-tabling, the best way is to use tracking software with a HUD (Heads Up Display. If you want something for free then the PokerStrategy Elephant is a great place to start. If you were after other software, the two most popular options are PokerTracker3 (PT3) and Hold'em Manager (HEM). A quick trip to google will help you find both!
Trust this provides a starting point and good luck with the SH.