I think waves has 1 as a plug in... if u mean a prog. that does one spectrum analisys I really can't offer much help... Maybe Basil will know!
2 achieve full bodied sound I would use some reverb, and delays, carefull panning delays! Use few but very destintive sounds and try 2 slot them in diferent freq.s... U probably know this already... but I guess just 4 the record and 4 maybe others that might have not though about it!

Z