You should have an inspiron drivers disk that came with the laptop also. If you don't have it, give dell a call and they should be able to send a copy out with you. Once the OS is reinstalled, pop the disk in and it will autodetect your hardware and you can install the drivers that show up as uninstalled.
Edit: just reread your original post, you don't have to install the dell "stuff" if you don't want to.