I've been learning Sleep Now In The Fire by RATM recently but I can't do the solo bit.
I mean I could do but I don't have the right gear for it, for one I don't have a whammy bar on my guitar and apparently you need two sets of pickups as well, each with volume control and I don't have that.

Any suggestions of how to play it normally??

Can't play it without a tremelo and a killswitch really...

Try using a slide.
Yeah you need the killswitch to toggle the feedback. Unless you bent the strings behind the nut of the guitar and turned your volume knob REALLY quickly, I'd just give up.