Replacing one roter with another

Im replacing an Linksys WRT310N router which is set up wireless with an Dlink DIR-825. My computer has a Linksys PCI adapter (wireless) WMP300N. Is there away to set up the DIR-825 without setting up an wired connection to my computer and if so how. The reason im asking is because I suck at setting up a wired connection . It takes me for ever to get it right. I can build a computer but suck at setting up internet connections except the wireless was easy for me. Ive tried it the way they want me to and I only get an local connection. Once i get this done then I need to set up an wireless bridge with an DLINK DAP-1522. I need help please