upgrade Instrument panel

I'm looking at a 1998  A4 Avant and i wanted to know if it's easy to upgrade the the  radio,hvac heated seat area to the 2000 look i like how that looks a lot more. also it doesn't have the keyless entry remote was that standard on 98 models and if it was is it the flip key or just a remote i've seen a few on ebay for both. Thanks

I would suggest that if you like the look of a 2000, buy a 2000.  Its not like there aren't a shortage of them.