Awesome! So, would a Shimano Deore be compatible (Shimano STX is on there ATM, I really don't know what all the spacing and such is, or how I know/mesure it)? Also, just to double check, I need: the front and rear shifters, the chainrings (is there a name for all three of them?), the new chain, the front and rear derailleur, correct? Will I be able to install it myself? With what tools? Thank you

Edit: I took another look at my bike. The hub is a Shimano STX FH-MC32. And here are some pics: