Hey all, im new so take it easy on me

Ok im using the trial version right now, and have been downloading all kinds of stuff to customize my desktop. but what i was wondering is, can you change some basic things about a skin or windowblind theme, like text, etc ? I know you can change the color and hue when you buy the software, but is there any way to ever alter text, or different things like that ? also, i was messing around with Sysmetrix trying to find different ones i liked and the one i liked the best was CopperDeck, but the copper color doesnt go well with my theme, so is there any way to alter the color of the sysmetrix theme ? thanks in advance, and sorry if this is a dumb question.